SC CE1Mb =..:

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NEW SERIES FRIDAY NOVE 3 1939 SUBSCRIPTION, $6.00VOL. 90, No. 2340 F MBER , SINGLE COPIES, .15

Textbooks for the Second TermRanson's Neuro-Anatomy

By STEPHEN W. RANSON, M.D., PH.D., Profes-sor of Neurology and Director of the Neurologi-cal Institute, Nor.thwestern University. Octavoof 507 pages, with 382 illustrations, some incolors. Cloth, $6.50. New (6th) Edition!

Williams' Anatomy & PhysiologyBy JESSE FEIRING WILLIAMS, M.D., Sc.D.,Teachers College, Columbia University. 12moof 607 pages, 367 illustrations, 29 in colors.Cloth, $2.75. New (6th) Edition!

Marshall's Human AnatomyBy CLYDE MARSHALL, M.D., Assistant Professorof Anatomy, Yale University. 12mo of 388pages, with 257 illustrations, manv in color.$2.50. New (2nd) Edition!

Stiles' Human PhysiologyBy PERcY GOLDTHWAIT STILES, formerly Assis-tant Professor of Physiology at Harvard Uni-versity. Revised by GORDON C. RING, AssistantProfessor of Physiology, Ohio State University.12mo of 450 pages, illustrated. $2.25.

New (8th) Edition!

Schneider's Physiologyof Muscular Activity

By EDWARD C. SCHNEIDER, M.P.E., PH.D., D.Sc.,Professor of Biology at Wesleyan University,Middletown, Connecticut. 12mo of 428 pages,illustrated. Cloth, $3.00. New (2nd) Edition!

King & Roser's Anatomy andPhysiology Laboratory Manual

By BARRY GRIFFITH KING, PH.D., Assistant Pro-fessor of Physiology, College of Physicians andSurgeons; and.HELEN MARIA ROSER, B.A., R.N.,Instructor in Nursing, Department of Nursing,College of Physicians and Surgeons; ColumbiaUniversity. 270 pages, illustrated. $2.75.

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Sturtevant & Beadle's GeneticsBy A. H. STURTEVANT, Professor of Genetics,California Institute of Technology; and G. W.BEADLE, Professor of Genetics, Stanford Uni-versity. 12mo of 391 pages, illustrated. Cloth,$3.25. Brand New!

Bogert's Nutrition & FitnessBy L. JEAN BOGERT, PH.D., formerly Instructorin Medicine, University of Chicago, 12mo of 602pages, illustrated. Cloth, $3.00.

New (3rd) Edition!

Etheredge's Health FactsBy MAUDE LEE ETHEREDGE, M.D., DR.P.H., Pro-fessor of Hvgiene and Medical Advisor forWomen, University of Illinois. Foreword byRAY LYMAN WnBUR. 12mo of 410 pages, illus-trated. Cloth, $2.00. New (3rd) Edition!

McLester's Nutrition and DietBy JAMES S. MCLESTER, M.D., Professor ofMedicine, University of Alabama. With achapter on Infant Feeding by PHiuip C. JEANS,M.D.; and a chapter on Diets for Surgical Pa-tients by DEAN LEWIS, M.D. Octavo of 838pages. Cloth, $8.00. New (3rd) Edition!

Todd & Sanford's ClinicalLaboratory DiagnosisBy JAMES CAMPBELL TODD, M.D., and ARTHURHAWLEY SANFORD, M.D., Professor of ClinicalPathologv, University of Minnesota (The MayoFoundation). Octavo of 841 pages, with over500 illustrations on 368 figures, 29 in colors.Cloth, $6.00. New (9th) Edition!

Bliss' Guide in BiochemistryBy SIDNEY BLiss, PH.D., Professor of Biochem-istry, Tulane University School of Medicine.103 pages. Cloth, $1.25. Brand New!

W. B. SAUNDERS COMPANYWest Washington Square _ _ - - - Philadelphia

Entered as second-class matter JuIV 18, 1923, at the Post Office at Lancaster, Pa., under the Act of March X, 1879.

2 SCIENCE-ADVERTISEMENTS

Two Important Blaliston BooksBy

DoROTH JORDON LLOYD,D.Sc., F.I.C.,

Director, British LeatherManufacturers' Research

Associationand

AeNzs SHoRE, B.Sc., A.I.C.,Demonstrator, Physiology

Department, London School ofMedicine for Women.

ByLESLIE J. HARRIS,Pr.D., Sc.D., F.I.C.,

Nutritional Laboratory,Medical Research Laboratory,

University of Cambridge.

Lloyd and Shore

Chemistry of the Proteins 2nd EditionSurveying and summarizing the advances in our knowledge of the proteins,the authors present in this book a synthesis of the important facts cover-ing all branches of science bearing upon the subject. The constitutionaland physical phases of proteins are treated from the chemical standpoint.101 Illus. 532 Pages. $5.50 (1938)

Harris

Vitamins and Vitamin DeficienciesThis is the first volume of a series which will present a comprehensivesynopsis of modern research in the field of vitamins. It deals with Vita-min History; Vitamin B1 and Beri-Beri. Incidence of Avitaminoses invarious regions; conditioned deficiencies; hypovitaminosis and its detee-tion; methods of estimating vitamins and their merits; vitamin action;newly recognized factors, are given special consideration.50 Illus. Bibliography. 204 Pages. $2.50 (1939)

THE BLAKISTON COMPANY Philadelphia

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Is a research organization working in manyfields. Its monographic publications are placedin the principal libraries of the world. Copiescan be purchased at nominal cost.

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THE ROSE GARDENOF THE

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ECOLOGYAll Forms of Life in Relation to EnvironmentEstablished 1920. Quarterly. Official Publica-

tion of the Ecological Society of America. Sub-scription, $5 a year for complete volumes (Jan. toOct.). Parts of volumes at the single number rate.Back volumes, as available, $6 each. Single num-bers, $1.50 post free. Foreign postage: 40 cents.

GENETICSResearch in Heredity and Variation

Established 1916. Bi-monthly.Subscription, $6 a year for complete volumes

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Orders should be placed withThe Secretary, Brooklyn Botanic Garden1000 Washington Ave., Brooklyn, N. Y., U. S. A.

2 SCIENCE-ADVERTISEMENTS VOL. 90, No. 2340

SCIENCE-ADVERTISEMENTS

"The Ajax-Northrup Furnace installed in the Metal- Metallurgical Laboratory, Rensselaerlurgical Laboratory at the Rensselaer Polytechnic Polytechnic Institute, and general viewInstitute has been in continuous use by graduates of the top floor. Every undergraduateand undergraduates since it was installed in 1924. in the chemical and metallurgicalcourses for the past 15 years has used"It has been the melting tool used in most of the and become familiar with the Ajax-metallurgical theses which have been presented for Northrup Furnace.graduation."It has been used continuously by graduate students and members of the staff for thefollowing:"For making a wide variety of alloys with useful physical and electrical properties."For investigations in the field of magnetic alloys, particularly of iron, nickel and aluminum."For melting in vacuum where oxidation during melting was a factor to be avoided.toAs a sintering tool in powder metallurgy."As a melting tool for powdered materials such as refractory carbides which could not

be melted by conventional means."We know that this furnace will continue to be of service in a wide variety of fields."

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4 SCIENCE-ADVERTISEMENTS

A.H.T. CO. SPECIFICATION

MI CR O S L IDESNON-CORROSIVE, RED LABEL

No. 7030. Special Micro Slides Assorted Sample Package

MICRO SLIDES, Non-Corrosive, Red Label, A.H.T. Co. Specification. Of hardglass, nearly pure white in color and gua.ranteed against corrosion in any climate. Thick-ness varies between 1.18 and 1.30 mm, with an average of 1.23 mm.

The glass from which our Special, Clinical and Glazed Edge Slides are made has beengreatly improved in quality-particularly as to surface finish and uniform thickness-sothat the three grades are identical as to stability, optical quality and planeness of sur-face, the classification depending upon freedom from bubbles, pits, nicks and striae andin the finish of the edges and corners.

Special Slides. With polished edges, slightly beveled on the three-inch edge, and withrounded corners. EnLrely free from bubbles, pits, nicks, and striae. Individuallyselected and offered as, in our judgment, the best micro slide now available.

Clinical Slides. With polished edges and rounded corners, i.e. identical with Special Slidesexcept for the omission of the slight bevel on the three-inch edge and that select'on isbased upon the plate from which the slides are cut, rather than upon the individualslide, so that an occasional slide may be found with a slight defect. Offered as a superiorslide for general work.

Glazed Edge Slides. Identical with Clinical Slides except as to flnish of the edges and cor-ners. These Glazed Edge Slides are manufactured by a new process which eliminates theedge grinding and consequent washing and drying, and results in a low price slide suit-able for all routine and student use.

Some Micro Slides show cloudiness near the edge-and sometimes throughout theusable surface-as a result of the deposit of powdered glass in solution from the edge-grinding process, with too rapid drying and insufficient cleaning thereafter. All of ourslides are free from this defect because of the procedure followed for cleaning and dryingthe Special and Clinical Slides after manufacture. Sample package sent without chargeto organized laboratories upon request.

Code7080. Micro Slides, Special, Non-Corrosive, Red Label, size 3 x 1 inches, as above described. Word

Packed in distinctive brown grained cartons containing % gross. Per gross. 1.10 Juvgu7080-B. Ditto, Clinical. Per gross ..80 Juvkm7080-C. Ditto, Glazed Edge. Per gross ....................................................... .60 Juvol

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4 SCIENCE-ADVERTISEMENTS VOL. 90, No. 2340

NOVEMBER 3, 1939 SCIENCE-ADVERTISEMENTS

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El 151A4 8 pages DETERMINATION OF SOLUBLE AND

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El 165 PETROLEUM TESTING APPARATUS. 112

pages. Apparatus conforms to A.S.T.M. and other currentstandards.180 LABORATORY BURNERS. 8 pages. Burners for

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6 SCIENCE-ADVERTISEMENTS VoL. 90, No. 2340~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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Made of clear, heavy glass without constriction at the neck so that the width ofthe mouth is the same as the inside diameter of the body of the jar.The contents are enclosed entirely in glass, with a rubber gasket between coverand jar to make a tight joint. A-metal clamp with screw fastener maintains asecure seal and at the same time offers ready accessibility to the material or speci-men without the difficulty of opening a permanent closure as is the case with theordinary rectangular museum jar.

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6 SCIENCE-ADVERTISEMENTS VOL. 90, NO. 2340

NOVEMBER 3, 1939 SCIENCE-ADVERTISEMENTS 7

_pt ~CENCO-_blIHARRINGTONS

_ ~TIMER73416

T HE Cenco-Harrington timer provides another order of accuracy in measuringeither short or long intervals over measurement with stopwatches, where alter-

nating current at 110 volts, 60 cycles, with controlled frequency is available. Itconsists of a self-starting synchronous motor, with self-contained gear reductionto give a reduced speed to the protruding shaft. The latter is provided with asmall toothed flange, intended for the engagement of a simple clutch on the shaftof a revolution counter. The latter is moved into and out of engagement by press-ing or tapping one side or the other of a small shift lever. All parts are mountedon a finely finished metal base. The motor and gears are completely enclosed ina ventilated metal housing, which also carries a switch for starting or stoppingthe motor. The last number wheel of the revolution counter indicates fractionalsecond intervals directly; the second number wheel indicates whole seconds. Thetotal capacity is 10,000 seconds and repeat. The start-and-stop mechanism isexceedingly quick-acting, which reduces the mechanical error to insignificance incomparison with the interval being measured. The motor is powerful and posi-tive; it remains in exact synchronism.The Cenco-Harrington Timer fills a long-felt need in every laboratory in whicheither short or long time intervals must be measured with more than stopwatchaccuracy.

73416 Cenco-Harrington TimerNo. .............................................. A BDirect reading in, seconds .......... .................. 1/10 1/100Each .............................................. $30.00 $32.00

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SCIENCE-ADVERTISEMENTS 7NovzmBm:R 8, 1939

8 SCIENCE-ADVERTISEMENTS VOL. 90, No. 2340~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

B&L ACCESSORIES ADD TO YOURBALOPTICON'S ADAPTABILITY

THE B&L FILM PROJEC-TOR ATTACHMENT con-verts lantern slide balopti-con into still film projector.

THE B&L MICRO-PRO-JECTOR ATTACHMENTallows use of microscopeslides for projection ma-

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proper size.

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.j11

8 SCIENCE-ADVERTISEMENTS VOL. 90, NO. 2340

VOL. 90, No. 2340

adequate standards for the professional training ofpublic health laboratory personnel; to encourage con-stant effort toward the improvement and standardiza-tion of technical methods; to collect and make acces-sible to all persons in official administrative positionsin public health laboratories such information and dataas might be of assistance to them in the proper ful-filment of their duties.

It is proposed in the by-laws that the conference con-tinue to meet annually at the place of the annual meet-ing of the American Public Health Association on theday preceding the opening date. Scientific and busi-ness meetings open to the entire membership have beenprovided for, as well as executive sessions limited tofull members for action on matters of policy affectingstate or provincial public health laboratories. Theconference will continue issuing annually a mimeo-graphed volume of proceedings which will be fur-nished to members and sold to others as in the past.The officers and councilors elected for 1939-40, all

directors of state laboratories, are: Chairman, Dr.Friend Lee Mickle, Connecticut; Vice-chairman, L. F.Ey, Ohio; Secretary-Treasurer, Miss K. E. Cox, WestVirginia; Councilors, Dr. T. F. Sellers, Georgia, andDr. E. S. Robinson, Massachusetts.

IN HONOR OF DR. EVARTS AMBROSEGRAHAM

THE former and present pupils and associates ofDr. Evarts Ambrose Graham, Bixby professor of sur-gery at Washington University, Saint Louis, cele-brated recently the twentieth anniversary of his pro-fessorship. Scientific sessions were held on October11 and 12, and a dinner in his honor was given on thenight of the twelfth.At this dinner public tributes were given by Dr.

Philip A. Shaffer, dean of the department of medicineat Washington University; Dr. Allen 0. Whipple,professor of surgery, Columbia University, and pres-ident of the American Surgical Association; Dr. J. A.Hayden, of Melbourne, Australia, and by Dr. Mal-vern B. Clopton, clinical professor of surgery ofWashington University and president of the corpora-tion of this institution.

In addition to the presentation of a scrapbook andsilver, there was announced the establishment of theGraham Lectureship to be given annually in SaintLouis. Dr. Graham received tributes by letter andtelegram from all over the world. There were presentabout forty-five of his former pupils from scatteredpoints. Several guests expected from abroad wereprevented from attending by the war. An abstract ofthe proceedings is to be published in Surgery.

NOMINATIONS FOR PRESIDENT-ELECT OFTHE AMERICAN CHEMICAL SOCIETY

LocAL sections of the American Chemical Society

have proposed for nomination for president-elect thefollowing members:

H. S. Booth, professor of chemistry, Western ReserveUniversity.

Sidney M. Caldwell, director of Development Division,Tire Department, U. S. Rubber Company.

William Mansfield Clark, professor of physiologicalchemistry, the Johns Hopkins University.M. L. Crossley, director of research, the Calco Chemical

Company, Bound Brook, N. J.Gustavus J. Esselen, president and treasurer, Gustavus

J. Esselen, Inc.William Lloyd Evans, professor of chemistry and chair-

man, the Ohio State University.Francis C. Frary, director of research, Aluminum Com-

pany of America.Per K. Frolich, director of the Chemical Laboratories,

The Standard Oil Development Company.Harry N. Holmes, professor of chemistry and head of

the department at Oberlin College.Henry G. Knight, since 1927 chief of the Bureau of

Agricultural Chemistry and Engineering, U. S. Depart-ment of Agriculture.Townes R. Leigh, acting vice-president of the College

of Arts and Sciences, University of Florida.R. E. Swain, head of the department of chemistry, Stan-

ford UJniversity.Floyd E. Bartell, professor of chemistry, the University

of Michigan.

RECENT DEATHS AND MEMORIALSDR. MARGARET FLOY WASHBURN, professor emeritus

of psychology at Vassar College, died on October 29at the age of sixty-eight years.HENRY CLAY ANDERSON, dean of the College of En-

gineering of the University of Michigan, died onOctober 14 at the age of sixty-six years.PROFESSOR WILLIAM JORDAN SWEETSER, since 1915

head of the department of mechanical engineering atthe University of Maine, died on October 15. He wassixty-five years old.

DR. RODOLPHO VON IHERING died in Saio Paulo,Brazil, on September 15, at the age of 56 years. Atthe time of his death he was chief of the Servigo Fed-eral de Piscicultura, Rio de Janeiro.R. S. TROUP, professor of forestry in the University

of Oxford and fellow of St. Johns College, from 1924to 1935 director of the Imperial Forestry Institute,died on October 1, aged sixty-four years.DR. G. M. MURRAY, emeritus professor of medicine

in the Victoria University of Manchester, known forhis work on diseases of the thyroid gland, died onSeptember 21.DR. EDOUARD BUGNION, professor emeritus of the

Medical Faculty and the University Faculty of Lau-sanne, died on July 4 in his ninety-fourth year. Hewas known for his work on the anatomy and histologyof invertebrates.

414 SCIENCE

NOVEMBER 3, 1939

PROFESSOR Giumio SIRovICH, professor of chem-istry in the University of Rome and director of theNational Institute of Metallurgical Chemistry, waskilled in an automobile accident on October 4.

A MEMORIAL meeting in honor of the late Dean Her-man Schneider, of the University of Cincinnati,founder of the plan of cooperative technical educa-tion, will be held at the University of Cincinnati on

November 5. President Raymond Walters will pre-side, and addresses will be made by Dr. Charles F.Kettering, vice-president of the General Motors Cor-poration; Dr. Parke R. Kolbe, president of theDrexel Institute of Technology, Philadelphia, Pa.,and Dr. Frank W. Chandler, professor of Englishand comparative literature in the College of LiberalArts.

SCIENTIFIC NOTES AND NEWSTHE Nobel Prize for physiology and medicine for

1939 has been awarded to Dr. Gerhard Domagk, of theGerman I. G. Farbenindustrie, in recognition of hiswork with protonsil, forerunner of sulfanilamide andsimilar chemical compounds for the treatment ofstreptococcus infections. The prize for 1938, whichwas held over from 1938, has been awarded to Dr.Corneille Heymans, professor of pharmaco-dynamicsat the University of Ghent, Belgium, in recognition ofhis work on the sinus aorta mechanism in breathing.Dr. Domagk is reported to be awaiting the approvalof the German Government before accepting the prize.

DR. EDWARD A. Doisy, professor of biological chem-istry and director of the department of the School ofMedicine of the St. Louis University, received the sev-

enth annual St. Louis Award, at a public ceremony

held in the mayor's office on October 26. The award,$1,000 and a certificate, is the gift of an anonymous

donor. The certificate states that Dr. Doisy was

chosen: "For his brilliant investigations and researchwhich resulted in the discovery, isolation and syn-

thesis of the vitamin that checks hemorrhage."

THE Perkin Medal, given annually by the Societyof Chemical Industry for "valuable work in appliedchemistry," has been awarded to Dr. Charles M. A.Stine, vice-president in charge of research of E. I.du Pont de Nemours and Company. The ChemicalIndustry Medal has been awarded to Dr. Robert E.Wilson, president of the Pan American Petroleum andTransport Company.

THE annual Progress Medal of the Society of MotionPicture Engineers was presented on October 18 at thesemi-annual dinner to Dr. Loyd A. Jones, since 1916chief physicist of the laboratories of the EastmanKodak Company, in recognition of his contributionsto motion picture technology.

THE Franklin Institute of the State of Pennsylvaniahas made its first award of the .Vermilye Medal "inrecognition of outstanding contribution in the field ofindustrial management" to Lewis H. Brown, presidentof the Johns-Manville Corporation, New York. Pres-entation of the medal will be made in Philadelphia

on November 14. It is named after its donor, WilliamM. Vermilye, vice-president of the National City Bankof New York.

AT the graduation ceremony of the University of St.Andrews on October 6 the honorary degree of doctorof laws was conferred on Dr. Alexander Mackenzie,from 1914 until his retirement with the title emeritusin 1938 professor of chemistry in University College,Dundee.

THE Chicago Branch of the American Association ofScientific Workers at its October meeting elected thefollowing officers and members of the executive com-

mittee: Professor Arthur H. Compton, chairman; Dr.Zelma Baker, secretary-treasurer; Professor Anton J.Carlson, Dr. Ralph W. Gerard, Dr. Victor E. Johnsonand Dr. Benjamin F. Miller, members.

DR. Louis M. MASSEY, professor of plant pathologyat Cornell University, was elected president of theAmerican Rose Society at the recent Brooklyn meeting.

DR. P. S. BURGESS has returned as dean of the Col-lege of Agriculture of the University of Arizona anddirector of the Experiment Station, after spending a

year in a similar capacity at the Rhode Island College.Dr. R. S. Hawkins, who has served as acting dean andacting director, has been appointed vice-dean and vice-director in addition to reassuming his position as headof the department of agronomy.

DR. WILLARD M. ALLEN, associate professor of ob-stetrics and gynecology at the Medical School of theUniversity of Rochester, New York, has been ap-pointed professor of obstetrics and gynecology in theMedical School of Washington University, St. Louis.Dr. Otto H. Schwarz, who for eleven years has beenhead of the department, has expressed his desire tobe relieved of the administrative responsibilities ofthe conduct of the department in order that he mayhave time to engage in consulting practice.

Nature states that W. C. Wilson, director of the unitfor clinical research in surgery at Edinburgh RoyalInfirmary, has been appointed regius professor ofsurgery in the University of Edinburgh.

415SCIENCE

VOL. 90, No. 2340

added 5 cc of 85 per cent. lactic acid per 1,000 gramsof salt solution. Phenol red or other indicator may beadded if desired. Approximately 150 cc of the acid-saline is required for each analysis. The solution maybe dispensed from stock in 500 cc cylinders, for con-venient filling of the apparatus.

(2) Solution of NaOH, 16.0 per cent. by weight,having a specific gravity and vapor pressure approxi-mately the same as the salt solution, for absorption

FIG. 1

of CO2 and rinsing down of oxygen absorber. A singleseparatory funnel, with pipette-like tip, will allow thereagent to be conveniently accessible to the operatorsof 3 or 4 sets of apparatus.

(3) Oxygen absorber, consisting of 10 grams sodiumhydrosulfite (Baker) and 1 gram sodium anthra-quinone sulfonate (Eastman) dissolved rapidly in50 cc of 3N KOH, filtered through cotton and storedin a separatory funnel under paraffin oil. A singlecontainer should supply 6 to 10 students.

PROCEDURES

Levelling bulb, tubing and burette are filled withsalt solution and about 1 cc is run into the reagentcup "A," a gas sample is then introduced through thetube "B" to approximately the 10 cc mark. Most ofthe saline is run in from the cup, the cock is closed,and the burette tapped to dislodge traces of solutionfrom the upper end. Levels are adjusted and readingsrecorded at intervals until drainage is complete, whichmay require 5 to 15 minutes. The room temperatureshould be noted to the nearest 0.2° C. in vicinity of the

burette. It is essential that the gas sample should beprotected from sunlight or other causes of suddenvariation of temperature. To this end the operatorshould remain at least 3 feet distant from the buretteexcept during necessary manipulations, for heat radi-ated by the body may elevate the temperature of thegas without affecting the thermometer. A water jacketwill not assist in maintaining constancy of tempera-ture, for the heat of neutralization and of dilutionwhich is liberated during the analysis must be com-pletely dissipated, a process which occurs most quicklyby air conduction.CO2 is now absorbed by running in 2 cc of the

alkali, during about a minute. Time for completedrainage of the alkali rarely exceeds 8 minutes. Levelsshould be adjusted for the new reading and the tem-perature should be recorded. The volume of the gasshould be corrected in each instance for temperaturechanges greater than 0.50 C.

02 is absorbed by running in 3 to 4 cc of the hydro-sulfite reagent during approximately 2 minutes. Tofacilitate complete drainage and to avoid errors dueto vapor pressure differences, the hydrosulfite shouldbe washed down with 4 to 5 cc of the NaOH solution.Complete drainage may require from 10 to 15 minutes.The temperature, corresponding to the final volume,should be recorded.

After each analysis the fluid is run out by loweringthe leveling bulb to a container placed on the floor.The burette is then washed through the reagent cupwith 5 to 10 cc of NaOH, followed by water, followedby saline. The leveling bulb is then raised and refilledwith saline. If sulfur scum appears in the buretteit may be necessary to discard the first filling.

Since incomplete drainage is the chief source oferror of the method, scrupulous attention should bepaid to this factor.During changeable weather it is advisable to record

the barometric pressure and to make appropriate cor-rections of the gas volume.

J. MAx LITTLEHERBERT S. WELLS

PHYSIOLOGY DEPARTMENT,VANDERBILT UNIVERSITY SCHOOL

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A GUIDE to the STUDY of the ANATOMY ofthe SHARK, the NECTURUS, and the CAT.By SAMUEL EDDY, Associate Professor of Zoology; CLARENCE P.OLIVER, Assistant Professor of Zoology; and JOHN P. TURNER, As-sistant Professor of Zoology; all at the University of Minnesota.A manual of studies of the shark, the Necturus, and the cat, planned toaccompany a book of the type of Adams' "Introduction to the Verte-brates," or any other of comparable scope. It will be supplemented bya set of outline drawings (probably priced at $1.50). The material issuitable for either a one-quarter or a one-semester course.100 pages 6 by 9 $1.50

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