INSTRUMENTATION
Cary
INSTRUMENTS
provide greater
provide greater
provide greater
versatility accuracy
Figure 3
ΡοΙαι-ographic Bibliography
...through a wider choice of op erating ranges, response speeds, sizes and types of samples, sen sitivity, and a variety of acces sories and custom adaptations for special problems. Cary in struments are used for exacting analytical work of all types — from plant process control to complex research problems.
... by the use of advanced design principles which insure maximum performance permitted by the state of the art, and developments which provide sensitivity, stabil ity and reproducibility which cannot be obtained with other makes of standard instruments.
reliability For example, sapphire and carboloy is used at points of crit ical wear; kinematic principles are employed wherever positions or motions must be precise and reproducible; and circuits are designed so even large changes in characteristics of vacuum tubes and other components will not affect performance.
Literature
We have just received the new "Bibliography of Polarographic Lit erature 1922-1955" of the Ε. Η. Sargent Co., 4647 West Foster Ave., Chicago 30, 111. This most valuable compila tion was edited by Clarke L. Schmits and Edward F . Ewen. Sargent pre pared a 30-page technical brochure on this subject in 1937. Successive com pilations appeared in 1939, 1941, and 1945. The present bibliography ot 192 pages contains an alphabetical list of authors, completely cross-indexed, each bearing a serial number. All references
I N S T R U M E N T S FOR ANALYTICAL RESEARCH AND PROCESS STREAM CONTROL RECORDING SPECTROPHOTOMETERS-For rapid recording of spectra with good resolving power and high photometric accuracy. Provide the ruggedness and reliability needed for routine labora tory use, plus the flexibility to handle a variety of problems in the research laboratory. RAMAN SPECTROPHOTOMETER-Uses a u n i q u e
optical system which gives high light-gathering power, high zero stability a n d freedom from effects of scattered light. Provides the advantages of raman spectroscopy with small samples, high speed and good accuracy.
follow AMERICAN CHEMICAL SOCIETY
standard abbreviations. In all cases where an abstract of the paper was available, the abstract appears after the listing. This listing comprises 144 pages. I t is followed by an excellent subject index in which numbers follow ing each entry refer to the author listing and complete title. Cross indexing is extensive and entries are usually du plicated under two or more key words. There are many useful general group ings such as apparatus, instrumenta tion, and specialized versions thereof, comprising alternating current polarography, derivative polarography, os cillographic polarography, etc. The author listing numbers 6815 entries. Allowing for cross indexing and the prolific output of some workers in this field, it is still an impressive indication of the importance of this method of analysis. All analysts are heavily in debted to the editors and the Sargent Co. for this valuable compilation.
ELECTROMETERS-Vibrating reed instruments for measuring very small currents, charges and volt ages. High sensitivity and accuracy, good stability and reliability. Available for many applications — p H and carbon 14 determinations, mass spec trometry, etc. INFRARED ANALYZERS-For continuous analysis of flowing samples.Utilize selective detection and double beam optical system. Virtually free from zero drift. High inherent discrimination against interfering sample components. Unusual adapta bility to difficult analytical problems requiring high sensitivity and accuracy in complex mixtures. ULTRAVIOLET ANALYZERS-Provide a simple, reli able means of continuously analyzing flowing samples for components which absorb UV or vis ible radiation, or which can be converted to a suitable absorbing substance.
For complete descriptions, including sample curves, of all of Cary instruments, write for Bulletin AC-22.
APPLIED P H Y S I C S
CORPORATION
3 6 2 West C o l o r a d o Street Pasadena 1 , C a l i f o r n i a
For further information, circle number 73 A on Readers' Service Card, page 91 A VOL. 29, N O . 2 , FEBRUARY,,1957
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