Copper Assay in 8 Minutes

Eberbach ULTRA-SPEED

ELECTRO-ANALYZER

Where determination time is critical or where volume produc­t ion of determinations is urgent, this new equipment is your answer. Most determinations require approximately one fourth that of conventional apparatus; initial investment is less than for equivalent production capacity in conventional equipment. An analytically complete deposition of one gram copper sarn­ie takes 8 minutes or less. Best equipment previously required 30 to 60 minutes. Improved cell design, a unique electro-mag­netic field and more current produce the speed. Catalog No. 1250 $635.00

Write for Catalog 67

P.O. Box 1024 Eberbach Ann Arbor , Mich . 4 8 1 0 6

Circle No. 1 on Readers' Service Card See ACS Laboratory Guide for All Products/Sales Office

KLETT PRODUCTS

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KLETT COLONY MARKER AND TALLY. For the rapid and accurate counting of colonies. Marks and records at the same time, leaving per­manent record for rechecking. When all of the colonies in an area or dish have been marked, the tally is read and then is reset to zero with the reset knob. Plates that would be considered too crowded for counting by the usual method can be counted easily with this instrument. The counting opera­tion can be interrupted at any point without caus­ing errors. Complete with pen and extension cord. For operation on 115 volt, A.C., 60 cycle.

BIO-COLORIMETER KLETT

The visual color­imeter illustrated presents a num­ber of outstand­ing features mak­ing it ideal for c l i n i c a l o r r e ­search work. Built on the most modern mechanical and op­tical principles it is widely accepted for accuracy and dur­ability.

Klett MANUFACTURING CO., INC.

179 EAST 87th STREET, NEW YORK, Ν. Υ.

Circle No. 63 on Readers' Service Card

112 A • ANALYTICAL CHEMISTRY Circle No. 82 on Readers' Service Card -

CORPORATION