Delmar DIRECT DRIVE STIRRER

Delmar. Scientific Laboratories. 1551 NORTH CICERO AVENUE. CHICAGO 51, ILLINOIS. For further information, circle number 32 A-l on Readers' Service Car...
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NEW MERCURY DIFFUSION PUMP M

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NEWS October 13 X-Ray and Electron Diffraction. R. L. GRIFFITH, Eastman Kodak Co., Rochester, Ν. Υ.

you get all these features in one pump

• COMPACT

— Built in f o r e p u m p condenser eliminates bulky outside condenser



October 20 Chemical Applications of Ultraviolet Spec­ troscopy. W. WEST, Eastman Kodak Co., Rochester, Ν. Υ.

E F F I C I E N T — Reaches ultimate vacuum o f 1 0~ 6 a t a speed of 1 0 liters per second

October 27 Emission Spectroscopy. R. J. MELTZER, Bausch & Lomb Optical Co., Rochester, Ν. Υ.

• ECONOMICAL-Uses

minimum amount o f mercury. Forepump vacuum spirals through w a t e r to prevent mercury from entering forepump

November 3 Infrared and Raman Spectrometry. F. MILLER, Mellon Institute, Pittsburgh, Pa.

• LOW PRICE —

November 10

1 unit — $ 6 0 . 0 0 each 3 units — $ 5 4 . 0 0 each

Magnetic Resonance and Microwave Methods. B. P. DAILEY, Columbia Uni­ versity, New York, Ν. Υ.

Cat. ÎOS-70S0

November 17 Potentiometric and Polarographic Meth­ ods. L. B.ROGERS, Massachusetts Institute of Technology, Cambridge, Mass.

Delmar

December 1

Scientific Laboratories

Conductometric and Capacitimetric Methods. P. J. ELVING, University of Michigan, Ann Arbor, Mich.

CHICAGO 5 1 , ILLINOIS

1551 NORTH CICERO AVENUE

For further information, circle number 32 A-l on Readers' Service Card, page 53 A

December 8 Instrumentation in Industry. R. REAMER, Taylor Instrument Cos., Rochester, Ν. Υ.

DIRECT DRIVE STIRRER

Trace Analysis Symposium

A direct drive,' medium duty stirrer for general laboratory use, incorporates a higher quality, continuous duty motor and 1 / 4 " true running chuck.



1/50 H.P. MOTOR

• RHEOSTAT SPEED CONTROL •

DOUBLE HOUSING FOR EXTRA FUME PROTECTION

• CONTINUOUS DUTY • STAINLESS STEEL MOUNTING ROD



FOR 110 VOLTS AC-DC

Cat. No. 93695-Slirrer STANDARD SCIENTIFIC 34 West 4th Street

$30

each

SUPPLY CORP. New York 12, Ν. Υ.

A L L THE A P P A R A T U S , EQUIPMENT, SUPPLIES, CHEMICALS A N D REAGENTS NEEDED T O RUN T O D A Y ' S M O D E R N LABORATORIES For further information, circle number 32 A-2 on Readers' Service Card, page 53 A

32 A

I

A Symposium on Trace Analysis will be held November 2 to 4 a t t h e Academy of Medicine, New York, Ν . Υ . John H . Yoe, University of Virginia, Char­ lottesville, Va., is chairman, and H e n r y J. Koch, Jr., Sloan-Kettering I n s t i t u t e , New York, Ν . Υ., is coordinator. At­ tendance a t t h e meeting, which is being sponsored b y t h e Rockefeller F o u n d a ­ tion, is by invitation only. T h e symposium has a threefold pu rpose : to bring together authorities in scientific disciplines related to the de­ termination of trace constituents in industrial, agricultural, biological, and medical fields; to consider which tech­ niques are directly applicable t o t h e various fields of investigation; and t o discuss t h e separation and concentra­ tion of millimierogram quantities of metals and t h e problem of contamina­ tion hazards. A t o t a l of 21 papers will be presented covering such topics as chromatography, ion exchange, extrac­ tions and separations, microscopy, spot testing, colorimetry, fluorimetry, spec­ t r o m e t r y , p h o t o m e t r y , potentiometry, coulometry, polarography, amperometry, spectroscopy, micrography, neutron activation analysis, a n d micro­ biological techniques. ANALYTICAL

CHEMISTRY