Tfamm*. .Automatic Sampling, Readout, and Printout Systems

for Spectrophotometric Analyses

save time reduce errors

The ever-growing line of Thomas spectrophoto­metric accessories—cells, cell carriers, sampling modes, digital readouts, concentration readouts, printouts and data converters—save operator time and reduce errors produced by deviations in tech­nique and tedium incurred in processing heavy schedules of routine samples.

Not only are these accessories applicable to the most widely used spectrophotometers, but—more important—they require no changes in method­ology.

Their modular design allows conversion from

manual technique to semi-automated and fully-automated analytical capability. There is no need for a large initial outlay; units may be added at any time without obsoleting components previously purchased.

Thomas accessories are available for use with Coleman Models 101, 111, 124 and 139 Spectro­photometers, the Bausch & Lomb Spectronic 20 Model 4, and the Turner Model 330. Some can be used without modification of the basic instruments; others require use of basic instruments which we modify in our own shops.

Copy of Bulletin 153 containing detailed listings of Thomas spectrophotometer accessories sent upon request.

7ÂOMOÙ. ARTHUR H. THOMAS COMPANY Τ Scientific Apparatus and Reagents

VINE STREET AT 3RD · P.O. BOX 779 · PHILADELPHIA, PA. 19105, U.S.A. Circle No. 57 on Readers' Service Card

76 • ANALYTICAL CHEMISTRY