Jui.ru 9, 1944 SCIENCE-ADVERTISEMENTS

More than 315 colleges

used this book last year!

Used in ARMY and NAVY premedical courses in 31 colleges and universities

COMPARATIVE VERTEBRATE

naist4t y[[

IF YOU have not yet selected it or consideredit carefully for summer and fall classes, sendfor an examination copy now.

Here are a few of the enthusiastic commentsfrom teachers and scientific reviewers:

* "It is the most outstanding book in the field."-B. H. WILLIER, Johns Hopkins.

* "This is anatomy working before the eyes ofthe student. Laboratory guide and text com-

bined, encyclopedic in scope and brilliant inbrevity, this book has no present equal."

-THE SCIENCE COUNSELLOR.

*"Miss Hyman strikes out for the core of a

problem, either by reading and interpreting theoriginal work or by making her own dissections."

-FREDERICK FERGUSON, Dept. of Biology,College of William and Mary.

* "Miss Hyman is a gifted writer of textbooks.. . .Her approach, from the systematic ratherthan from the type aspect, is in accordance withprogressive ideas generally entertained on thesubject . . . the author has given us the mostuseful textbook on comparative vertebrate an-

atomy so far available in the English language."-SCIENCE.

By

Libbie H HymanPublished in September, 1942, this book is the

greatly revised and expanded version of MissHyman's earlier LABORATORY MANUAL. OR COM-PARATIVE VERTEBRATE ANATOMY, which, pub-lished in 1922, was used steadily and widely for20 years, meeting no serious competition in itsfield. In its revised form, COMPARATIVE VERTE-BRATE ANATOMY is both a textbook and a manual.It includes 164 new pages of text material, andtwice as many illustrations as the first edition.Each system is traced from its embryonic be-ginnings through its changes in the vertebrategroups to its culmination in the mammals. Thedevelopment of each system is illustrated bydissections. $3.50

Mfi THE UNIVERSITYi OF CHICAGO PRESS

A hy 2gg 5750 Ellis Avenue~~~ ~Chicago 37, Ill.

JUNZ 9, 1944 SCIENCE-ADVERTISEMENTS 9

SCIENCE-SUPPLEMENT VOL. 99, No. 2580

SCIENCE NEWSScience Service, Washington, D. C.

THE EARTH'S.MAGNETIC FIELD ANDLONG-RANGE FORECASTS OF

THE WEATHERTHAT long-range weather forecasts based on fluctua-

tions in ultraviolet radiations received from the sun can

obtain great help from a century's accumulated recordsof changes in the earth's magnetic field, was suggestedby Dr. H. B. Maris, of the U. S. Naval Research Labora-tory, at the meeting of the American Geophysical Union.

Calling attention to the pioneer work in correlatingsolar radiation changes with cycles in the earth 's weathercarried on by Dr. Charles G. Abbot, secretary of theSmithsonian Institution, Dr. Maris pointed out that theearth 's magnetic- field affords an instant and sensitiveindex to any change in ultraviolet radiation coming tous from the sun.

The great mass of earth-magnetic records show many

persistent cyclic changes and these represent world-widechanges as contrasted with weather records, which usuallyrepresent local conditions. There is thus available to theweather forecaster, in the magnetic records, a vast storeof information about solar radiations which probably can

not be equalled by direct radiation measurements in 50years.An analysis of the magnetic records has led Dr. Maris

to certain general conclusions, which, he cheerfully admit-ted, "are probably wrong." However, he challenged,"any one who proves them wrong must produce evidenceto support a better guess."One seventh of all magnetic fluctuations he considers

due to gases from the tails of comets, swept up out ofspace by the earth as it swings across the cometaryorbits. The relation of these orbital magnetic disturb-ances to weather, he said, should be quite different fromthat of the solar disturbances which are caused by ultra-violet radiations.The remaining six sevenths of terrestrial magnetic dis-

turbances Dr. Maris considers due to fluctuations in ultra-violet radiations originating on the sun. Dominatingthese cycles of ultraviolet changes, he stated, are threegreat eruptive solar disturbances-veritable giant fierygeysers-that have persisted on the sun throughout thepast century. Study of the records of these, especiallyduring the past forty-four-year period, has convinced Dr.Maris that their periodicities have had close correlationswith weather cycles on the earth.

ITEMSPLENTY of moisture in the soil to insure a big food

crop-more than plenty in some places-is the encourag-ing report of the state of the nation as a whole summar-

ized out of hundreds of individual observers' dispatchesat the U. S. Weather Bureau. The corn crop, though latein getting planted, is as good as "made"' even beforethe seed go into the ground. The one troubling exceptionis a strip of drought along the Atlantic seaboard, covering

most of New England and running from New Jersey toGeorgia. A drought area in the Southwest has been givenat least a good dampening-down during the past week.A wide zone covering a large part of the prairie area westof the Mississippi continues rather too wet. The wettestspot is in central Iowa, where the Des Moines river andits two principal tributaries, the Raccoon and Skunk Riv-ers, are still above all flood marks since 1903. The soggi-ness rises to a second climax near the Gulf, where easternTexas reports fields exceedingly muddy, and where Louisi-ana cotton farmers are still unable to get their plantingdone.

A NEW contagious disease with symptoms so mild thesickness may go unnoticed is reported by Dr. Carl H.Smith, of Cornell University Medical College and theNew York Hospital, in the forthcoming issue of theJournal of the American Medicat Association. The chieffeature of the disease is an increase in the lymphocytes,one of the kinds of white cells in the blood. Althoughthe number of white cells may be increased almost ten-fold, the lymphocytes are not abnormal or atypical. Feverand vomiting, pain in the back of the head and neck, or

pain in the abdomen suggestive of appendicitis may occurin this new disease, but when they do, these symptoms lastonly a few days. In one case Dr. Smith reports, the childhad fever, vomiting and abdominal pain, but a brotherand sister had only symptoms of a mild cold. Only since1939 have cases of this disease, called acute infectiouslymphoeytosis, been reported. The cause has not beenidentified but is believed to be a virus. The disease appar-

ently attacks young children chiefly and they all seemto recover.

A NEW concrete wind tunnel has been put intooperation at the Edmund T. Allen Memorial AeronauticalLaboratory, of the Boeing Aircraft Company, at Seattle.The 18,000 horsepower electric motor, built by Westing-house Electric and Manufacturing Company, is capableof generating super-hurricanes in the 700 miles-an-hourrange, about five times the force of an average hurricane.In this wind tunnel, the largest operated by any privateaircraft manufacturer, Boeing engineers will test thebehavior of planes, wing shapes, and other parts or sec-

tions of aircraft at speeds approaching the speed ofsound, around 750 miles an hour. The need for a windtunnel producing high speeds became evident when itwas discovered that the aerodynamic rules that hold goodat present speeds may not apply to the planes of thefuture. It is believed that present-day aircraft at theirmoderate speeds affect the air ahead of them in such a

way that the air can readily flow about their wings andbodies. The airplanes of the future are expected tocruise at speeds from 600 to 800 miles an hour, and a

different type of airflow will occur at these higher speeds.

10

JUNE 9, 1944 SCIENCE-ADVERTISEMENTS 11

We are proud to announce

the SE JKENTH EDITIONV of

DANA'S SYSTEM OF MINERALOGYCentennial Anniversary Issue (1844-1944)

Entirely rewritten and much enlargedBy CHARLES PALACHE, HARRY B ERMAN, and CLIFFORD FRONDEL

Harvard University

VOLUME 1. ELEMENTS, SULFIDES, SULFASALTS, OXIDES

(Ready June 1944)

IN 1837 the first edition of this monumental work was

published privately by the author. Wiley's first con-nection with it was in 1844, and the publication of thefirst volume of the seventh edition in 1944 therefore marksthe 100th anniversary of our affiliation with the Danaproject.

Throughout these one hundred years, Dana 's "System"'has been in constant use by mineralogists, physical chem-ists and others seriously interested in the science ofmineralogy. Besides establishing a system of nomencla-ture, the "System" gives, as accurately as possible, thehistory of mineral species, the results of optical andmicroscopical investigation of minerals, crystallographicdata, the habits of crystals, classification, chemical formu-las and related points concerning minerals, analyses ofthe composition of the various known species, the rela-tionship of varieties of a species to the main species, andthe general occurrence and association of species.

A half-century has elapsed since the previous edition was

published, although three appendices were added to allowfor the inclusion of advances up to 1915. The seventhedition represents a radical revision, involving a completechange in the book to accommodate the new data thathave become available since the previous edition wasissued.

VOLUME I: Approx. 803 pages

5¼ by 83/8. Probable price, $8.50

Of particular note are these changes, to be found in thenew Seventh Edition: a new mineral classification, basedon crystal chemistry; a new elastic series of classificationnumbers for species; revised morphological elements basedon the structural unit cell; a new form of presentationof the crystallographic data; introduction of data de-rived from x-ray crystallography; revision of specificgravities, based on new observations; introduction of thetreatment of species; including generalized formulas fortypes, discussion of group relations, and a sharper defini-tion of varieties; a new method of treating minerals whichform a so-called series, that is, describing a series as ifit were a single-species description; expansion and anno-tation of the reference section to include sources of data,transformation formulas, lists of rare forms, general lit-erature, and a statement of controversial questions re-quiring elucidation.

JOHN WILEY & SONS, INC. 440-4th Ave. New York 16, N. Y.

In PreparationVOLUME II. Halides, Carbonates, Sul-

fates, Borates, Phosphates, Arsenates, etc.VOLUME III. Silica, Silicates.NOTE: Since the volume ready in Juneis only the first part of a treatise which willeventually comprise three volumes, the cur-rent edition, which is thb 6th, will remainin print until all three volumes of the 7thedition have been published.

-Mmim..l -

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W-,

Nown.- W~

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12 SCIENCE-ADVERTISEMENTS VoL. 99, No. 2580

Two recent books on STATISTICS

AN INTRODUCTION TO MANAGERIALBUSINESS STATISTICS

By Harry Pelle Hartkemeier, University of Missouri

W RITTEN from the internal manage-ment viewpoint, this book gives di-

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" Business executives . . . should readthis book because it indicates how these

methods may be applied profitably to thesolution of many of their managementproblems. '-Journal of the American Sta-tistical Association.

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proper understanding of the fundamentalsof the punch-card method. It is based ex-clusively on the use of the InternationalBusiness Machines equipment and is theresult of more than six years of teachingand experimentation in the author's intro-ductory courses in statistics. Whereverstatistical data are to be analyzed by mod-

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COMPANYNew York 16, New York

There has been no price increase in any CROWELL text or manual since before Pearl Harbor

0

12 SCIENCE-ADVERTISEMENTS VOL. 99, No. 2580

PENICILLINMERCK

|A RECORD OF PERFORMANCE|

THOROUGHGOING experience and establishedleadership in organic research, development,

and production have been the determining factorsin the rapid achievement of large-scale Penicillinproduction by Merck & Co., Inc.

Intensive research on Penicillin, begun in theautumn of 1940, established a sound basis for thesuccessful development of mass production. Byapplying chemical engineering principles to themanufacture of this intrinsically unstable anddifficultly produced substance, Merck & Co., Inc.succeeded in devising and perfecting a practicalmethod of production, based on the mass-fermen-tation principle.The following chronologic review tabulates the

more important advances leading to the presentvolume of Penicillin production, including some ofthe contributions that we have been privilegedto make:

1929-Penicillin discovered by Fleming in England.

1932-First report by British investigators con-

firming original work on Penicillin.

1940-First isolation of solid Penicillin by Oxfordinvestigators.1940-Merck research on antibiotics concentratedon Penicillin.

1941-First report of Penicillin's clinical value.

1941-Prof. H. W. Florey and Dr. N. G. Heatley,of the Oxford group, visited the United States toconfer with interested Government officials andmanufacturers, with the objective of establishingPenicillin production in America.

1941-Dr. Heatley, who participated in the firstproduction work in England, remained at theMerck Research Laboratories to collaborate withMerck chemists in developing test and productionprocedures.1941-Merck brought about a reciprocal arrange-ment between British and American investigatorsto spur production in cooperation with the UnitedStates and British governments.

1942-Merck supplied Penicillin for first case ofbacteriemia successfully treated with Penicillin inAmerica.1942-Merck Penicillin was rushed under policeescort to Boston for treatment of the CocoanutGrove fire casualties.

1943-Merck sent supplies of Penicillin to Englandby air transport for urgent therapeutic use by theUnited States Army Medical Corps.1943-Large-scale production of Penicillin wasestablished by Merck to meet Government re-quirements.1944-Merck sends ever-increasing supplies ofPenicillin to our Armed Forces.

Merck & Co., Inc. will continue to surpass present production records, with the

urgent objective of supplying adequate quantities of Penicillin for civilian use,

as soon as the essential requirements of our Armed Forces have been fulfilled.

-H- MERCK & CO., Inc. A RAHWAY, N.J.& In Canada: Merck & Co., Ltd., Montreal and Toronto

An illustrated booklet describing the clinical uses of Penicillin Merck is available on request.

a

VoL. 99, No. 2580

14 SC~hJNCE-ADvERTISEIIENT

FOR LATEST AUTHORITATIVEREVIEWS ON LABORATORY

PROCEDURES

A monthly publication cornmpiled for laboratory direc-tors, technicians and physi-cians. Full of essential factsand reviews of current literature on labora-tory procedure, professionally edited by R.B. H. Gradwohl, M. D., Sc. D. A neces-sity in, the modern laboratory. Published by

A~INIA~fl HLSCHOOL OFI0 fhII LABORATORYUDIEIMIYHlTECHNIQUE3514 Luces Av. St. Louls, Mo.

LaMotte H-C Chlorine Comparator(For High Chlorine Concentrations-

1.0 to 200 ppm. and above)

A special Chlorine Unit designed for uses wherea high residual of 1.0 ppm. or more of chlorine ismaintained. Price, complete with instructions,$12.50.The H-C Chlorine Comparator is one of a com-

plete new line of LaMotte Chlorine Units. Em-bodies latest approved developments, such ascontrol of color development, pH, etc., with a newseries of interchangeable 15 mm. chlorine colorstandards embracing the entire useful range. Thenew LaMotte o-Tolidine reagent is used with allLaMotte units, and may be purchased separately,in various package sizes. Write for descriptivebooklet.

LaMotte ChemicalProducts Co.

Dept. "H"Towson-4, Baltimore, Md.

Exposure Determinationin Photomicrography

by direct light meareoment in plane of image

PHOTOVOLT Electronic Photometer MOD. 511A highly sensitive light meterwith phototube and amplifier

Also suitable for spectrophotometry, de'nsitometryof spectrographs, micro-colorimotry, measrmnof lumninescence and fluorescence, ultraviolet emis-sion and absorption. Obtainable with phototubessnitv n the ultraviolet, visible,- infra-red.

PHOTOVOLT CORP.95 Madison Ave. New York 16,, N. Y.

t NEW DIFCO PRODUCTS

Bacto-Penicillin Mediumis a dehydrated medium designed for use inthe small scale laboratory preparation ofpenicillin extracts.

Bacto-Yeast Beef Agarand

Bacto-Yeast Beef Brothhave been prepared especially for use indetermining the potency of Penicillinaccording to the procedure of Schmidt andMoyer.

Bacto-Fluid Thioglycollate Mediaare prepared in accordance with the formulaeof the N.I.H. and are recommended fordetermining sterility of Penicillin and otherbiologics.

Specify "DIFCO"THE TRADE NAME OF THE PIONEERS

In the Research and Development of Bacto-Peptone andDehydrated Culture Media.

DIFCO LABORATORIESINXO P0BrATEDDETROIT, MICHIGAN

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JUNE 9, 1944 SCIENCE-ADVERTISEMENTS 15

FOR LOW-TEMPERATURE* Testing

* Storage* Conditioning

* Testing instruments, aircraft equipment, andmany materials to determine their perform-ance, durability, etc. at sub-zero temperatures.

* Storing metal parts at low temperatures forconditioning prior to use, as in chilling partsfor expansion fitting, etc.

* Treating tool and other steels by chilling toproduce desired characteristics otherwise diffi-cult to obtain by ordinary methods of treat-ment.

* Chilling aluminum rivets to retard age harden-ing and keep them soft enough for easy

driving.

* Accelerated ageing of metals to preventgrowth. "

* Storing serums, blood, chemicals, etc.

* Ideal for use as a food-freezing pilot plant.Working Chamber-24 x 24 x 24 in.

Constant Temperature

SUB-ZERO CABINETDry Ice Cooled

Temperature Range:- 100 to 220'F.

Constancy: JOF.Full Details in Bulletin A-2120

,0

AGAIN AVAILABLEDowmetal Multiple Carriers

forLarge Scale Blood Testing

Cat. No. 380 6-place multiple carrier forsix 5/8" x 4" blood serum tubes.

Cat. No. 381 8-place multiple carrier foreight ½" x 4" blood serum tubes.

128 Tube Capacity

Shown above, the 16-place head, No. 250A,for the Size 2 Centrifuge only, completewith sixteen No. 381. carriers. Total ca-pacity 128 ½" x4" tubes. With No. 380carriers, capacity 96 5/8" x 4" tubes. Samecarriers may be used in the 8-place head,No. 240, in the Size 1 Centrifuges withone-half the number of tubes.

Consult Your Dealer or Write Us

INTERNATIONAL EQUIPMENT CO.352 Western Ave. Boston, Mass.

Makers of Fine Centrifuges

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JUNE 9, 1944 SCIENCE-ADVERTISEMENTS 15

SCIEY¢CEs-ADVERTISEMENTS-

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The Microscope that Changed the Course of ScienceHere you see one of the earliestBausch & Lomb microscopes.This was the first microscope

produced by quantity production methods ...

the first precision compound microscope to bemade at a price which the average researchworker, educator or medical man could afford.These microscopes made research and studypossible in America on an unprecedented scale.Prior to this development of the mass pro-

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SCIENCE-ADVERTISEMENTS

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JUNE 9, 1944 17

- P *-'18 DVS-TIZME VOL. 99,- No. 2680

Spencer GK Delineascope used by an Air Force Technical Trvning Corps, University of Chicago

Seeing and Learning Quickly

In the first 28 months of its existencesince March 1941, the Army Air ForceTechnicalTrainingCommand turned-outmore than 500,000 ground and combatcrew technicians. An amazing total con-trasted with the record of the preceding20 years during which the Army AirCorps had graduated only 14,803 suchtechnicians.One factor which is helping to in-

struct such unprecedented numbers inso short a period is the use of visual

methods. Spencer Delineascopes are indaily service in this vital work.

Spencer LENS COMPANYBUFFALO, NEW YORK

SCIENTIFIC INSTRUMENT DIVISION OFAMERICAN OPTICAL COMPANY

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