VOLUME
2 4, N O .
1, J A N U A R Y
27 A
1952
The ultra-modern design of the Coleman Compax offers
the
chemist these unusual features. Precision b a s e d o n simplicity . . . Compax uses the classic potentiometer pH circuit, but in a new way . . . by replacing the usual null meter with a miniature neon, almost instant balance is made practicable . . . the usual working cell a d justment is eliminated by directly applying an oversize standard cell. E x t r a c o n v e n i e n c e . . . Fewer parts make the Compax easier to operate, easier to balance, easier to maintain. Almost all set-up time is eliminated, when the lid is opened the cell chain rises into position, ready for use.
COLEMAN
Fully p o r t a b l e . . . Everything for a year's service is packed inside the case, electrodes, liquids, even beakers . . . can be easily carried anywhere . . . ready to work anywhere.
COMPAX
For full d e t a i l s o f this a m a z i n g n e w instrument W r i t e D e p a r t m e n t A f o r Bulletin B - 2 2 5
pH METER
Coleman "Balanced Design" m e a n s . . . Precision + Convenience + Reliability.
COLEMAN INSTRUMENTS 318 MADISON ST. MAYWOOD, ILLINOIS
