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CYLINDRICAL OVEN Dependable for all types of laboratory and product drying. Fast uniform heating. Temperature range 37-200°C. Gravity circulation. Inside 14 % x l l J4". Thumb release door control. Now at a low $195.00.
Gas-Liquid Chromathermography . . A. G. Nerheim
436
Application of Optical Polarimetry and Density Measurements to Analysis of Ternary Mixture .
437
J. E. Hawkins and J. W. Vogh
Correspondence Methods for Obtaining Correction Factors for Fluo rescence Spectra as Determined with AmincoBowman Spectrophotofluorometer
438
W r i t e for Bulletin SB.
C. E. White, May Ho, and E. Q. Weimer C E N C O the most c o m p l e t e l i n e of scientific i n struments a n d l a b o r a t o r y supplies in the w o r l d .
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Separation of
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Halogenated
Chromatography
.
Phenols by
Paper
. H. S. Choguill and D. E. Bissing
440
Circle No. 19 on Readers' Service Card
Infrared Quantitative Analysis Data Nos.
121-123
,
441
LABORATORY RECORDER HIGH SENSITIVITY LOW
Aids for the Analyst
COST
$32500
Venturi Jet (Atomizer)-Type Burner for Determining Sulfur in Light Petroleum Products . C. W. Brown
442
Simple Fluorescent Intensification Screen for Ultra violet Scanner Cameras ,
443
D. F. Petersen and Arthur Murray III
MODEL #22700 SERVO-GRAPHIC RECORDER
FEATURES: « • • •
Pen travel 1 Second full scale Accuracy 9 9 % or better. Photoelectric C h o p p e r for long life Zener diode stabilized reference voltage. • Adiuslable p a p e r speeds • Input suitable for high impedance sources. • Adjustable range control
RANGE:
0 10 MILLIVOLTS D.C. 0-100
Gas Chromatographic Determination of n-Pentane and Lighter Components in Olefin-Free Naphtha: Using Ethyl Chloride as Internal Standard . . . H. D. LeRosen
MILLIVOLTS D.C.
The Servo-Graphic Recorder is an ideal l a b o r a t o r y instrument. Put it to w o r k and save a valuable tech nician's lime. O . E . M . users invited. W r i t e for literature
C. H. S T O E L T I N G C O . 12" CHART SERVO RECORDERS MULTI-CHANNEL HIGH FREQUENCY OSCILLOGRAPHS POLYGRAPHS · KYMOGRAPHS · MANIPULATORS
4 2 4 N O R T H H O M A N AVE., C H I C A G O 2 4 , ILL.
4 A
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ANALYTICAL CHEMISTRY
445
Rapid Injection and Automatic Refill Pipet H. V. Malmstadt and G. P. Hicks
Simple Helium Densitometer.
.
R. J. Koke»
Heater for Gas Chromatographic Columns. . J.
Circle No 165 on Readers' Service Card
444
N . R o p e r , Jr.
44d
447
