REPORT
ONLY
ized by a considerable empirical n a ture, D r . G. L. Booman of Phillips Petroleum's Atomic Energy D i v i sion, Idaho Falls, I d a h o , pointed out. T h e development of theory was considerably behind t h e needs of electrochemical technology and those of the analytical chemist. This situation has lately been r e versed. T h e theory of electrode responses for m a n y diverse condi tions of applied signals diffusion. and kinetic complications has been rigorously obtained. M a n y chem ists working with polarographic and other electroanalytical techniques have n o t y e t come to a full apprecia tion of t h e improvement in experi mental procedure and d a t a interpre tation t h a t these recent theoreti cal developments have made possi ble.
SPECTRONIC M
C O L O R I M E T E R S GIVE Y O U T H I S E X T E N D E D RANGE
I n parallel fashion, instrumenta tion theory has forged far ahead of the common laboratory practice, Dr. Booman continued. In the last twenty years, there has developed a new interdisciplinary science. This is t h e science of automatic control. A number of people have more recently used the term C y bernetics, to encompass this rather broad subject. A definition has been given as t h e science of organi zation of mechanical and electrical components for stability and pur poseful actions. I n this definition, we see stated the very purpose of anyone working in t h e field of in strumental analysis. W e are in terested in t h e best method of or ganizing chemical, mechanical, and electrical components to obtain use ful information.
OTHERS: - 400-700Γημ • SPECTRONIC 20 .' 340-950Γημ •
The Bausch & Lomb SPECTRONIC 20 has an unequalled extended range from 340mn to 950mu. Here's a range almost twice that of a n y other colorimeter . . . reason enough to p u t it in a class by itself. T h e only high quality color imeter in its price range using precision gratings. It has remarkable stability . . . needle never fluctuates even under severe power changes. There's no sacri fice in sensitivity . . . even at the lowest wavelengths. Reproducibility . . . far better than a n y other. It's the easiest one to use, too. T h a t ' s why it's the top seller—with over 30,000 in use today, throughout the world. T h e SPECTRONIC 20 m a y be purchased separately or as part of a complete D a t a Acquisition System . . . t h a t can process 4 samples a minute! For further information, or a demonstration in your laboratory, write to Bausch & Lomb Incorporated, 81009 Bausch Street, Rochester, Ν. Υ. 14602
BAUSCH & LOMB 1964 MASTER DESIGN AWARD
WINNER—Microscopes for Science Circle No. 48 on Readers' Service Card
3 0 A · ANALYTICAL CHEMISTRY
Teaching
and
B &L
Flexiscope
For t h e case of electroanalytical measurements, the w a y is clear for planning t h e cell design with a knowledge of the interaction of the cell with the other components of the measuring system. Limi tations on performance will be evident. T h e components re quiring change for improved per formance are m a d e evident. A powerful tool is t h u s available for interpreting results of present stud ies and for planning t h e most fruit ful direction of future efforts. Very complex systems can be fully a n a lyzed with a r a t h e r superficial knowledge of t h e system compo nents. T h e analysis and synthesis of these systems are straight-for-
