CODAGE with

NYLAB'S Improved DC Voltage

Stabilizer*

Eliminates all storage batteries and storage battery accessories for SPECTROPHOTOMETERS (especially the Beckman Model DU) and GENERAL LABORATORY APPLICATIONS

NEW EXTENDED RANGE, 5 volts to Ί0 volts DC

Φ Current range, 0 to 6 amperes at 6 volts, with approximately 40 watts available at higher voltages.

• Any secondary lower voltage is obtainable from a S-ohm built-in divider.

ALL VOLTAGES REGULATED against line changes to within ± 0 . 0 1 % No. 80710. Voltage Stabilizer $375

* Patent Pending

• WRITE FOR BULLETIN C53

Kktt. . . . Photometers

KUtt-SummenAOH.

PUotoeUcbUc ÇlaU Cell

ColatUHetm*

No. 900-3

*7Ue £Utt Vkvumeiet

No. 2070

Designed for the rapid and accurate determina­tion of thiamin, riboflavin, and other substance* which fluoresce in solution. The sensitivity and stability are such that it has been found particularly useful in determining very small amounts of these substances.

J L -KLETT SCIENTIFIC PRODUCTS,

ELECTROPHORESIS APPARATUS · BIO-COLORIMETERS GLASS ABSORPTION CELLS · COLORIMETER NEPHELOM-ETERS · GLASS STANDARDS · KLETT REAGENTS

Klett Manufacturing Co. ,179 EAST 87TH STREET, < NEW YORK, >NÎ Y.

48 A ANALYTICAL CHEMISTB

NEW YORK Laboratory Supply

COMPANY, INC.

76 Varick Street, New York 13, Ν. Υ.

Telephone: CAnai 6 -6504

^ ntT j υ ALL — i AB0RAT0RY SUPPLIES