PHOTOVOLT CORP

---

VOLUME

23,

NO.

9,

SEPTEMBER

1951

45 A

Only Taylor Comparators Provide ^ H N E LABORATORY ° I AMD EQUIPMENT FURNITURE AND t « „

PERMANENTLY GUARANTEED COLOR STANDARDS for testing

p H , CHLORINE, PHOSPHATE :

Simply place reagent treated sample in middle tube in base, move Color Standard until colors matcH and . . .

*, m .||

•ifafl

I

T h e r e ' s no d a n g e r of mechanical inaccuracy w h e n you use Taylor Comparators for d e t e r m i n i n g p H , chlorine or p h o s p h a t e , because all Taylor liquid color standards carry an unlimited guarantee against fading.

l

*&

fO*\

From coast to coast, leading laboratories recognize Peterson's reputation f o r quality furniture for laboratory, and library. Whatever your requirements may be, call on Peterson's experts for an economical solution to your problems . . . No o b l i g a tion is incurred.

One sturdy plastic slide houses all color standards necessary for any one determination. No fragile single standards to handle! Each complete set includes base, slide, reagents and accessories. The utility of these sets is high, but their cost is low. S £ E y o U R „ E A L E R F O R T A Y L O R S E T s . . W R I T E DIRECT FOR FREE DATA B O O K Gives 96 pages of helpful technical d a t a on " M o d e r n pH a n d Chlorine Control" in 34 basic manufacturing processes. W r i t e t o d a y if this valuable reference is not a l r e a d y in your l i b r a r y .

Distributors located throughout the United States

W . A . TAYLOR A N D C O

LEONARD P E T E R S O N & CO., INC. 1830 FULLERTON AVENUE

LUMETRON

C H I C A G O 14.

7302 YORK RD. • BALTIMORE 4, MD

ILLINOIS

Photoelectric Colorimeter M O D . 4 0 1

for accuracy, ease, and speed of operation in colorimetric and turbidimetric analysis With

built-in

For use with

stabilizer

of

tubes and

high

efficiency

precision cuvettes

W i t h sliding tube carrier and sealed photocell For operation from power line and battery In rigid metal housing with Plexiglas cover

For Production Control Analytical

Laboratories

Educational

Write for Bulletin §409 to

Institutes

Price, complete with 6 color filters $ 1 5 8 . —

PHOTOVOLT CORP. 95 Madison Ave.

New York 16, N. Y.