NEW PRODUCTS Prism-Grating Spectrophotometer Beckman's Instruments Division is now making the IR-7 prism-grating in frared spectrophotometer with grating operation throughout the 2.5 to 16.6μ. Introduced a little over a year ago as a custom-made unit, the double-monochromator IR-7 is now going into regu lar commercial production (ANAL. C H E M , October 1958, page 91A). P-10
portable model suitable for detecting very small amounts of ionizable com pounds. Detector time constant, de pending on the relative flow rate of the carrier gas, may be as low as 1 / 4 sec ond when using a capillary column.
Analog Output System The new analog output system, an nounced by Bendix Aviation Corp.,
P-8 Stereomicroscope An entirely new line of stereomicroscopes being introduced by Bausch & Lomb Optical Co. features a completely dust-sealed optical system and "StereoZoom" magnification—a new concept that makes possible a continuous flow of magnification, infinite within the range of the instrument. The new line eliminates need for sep arate lenses and nosepieces, prevents blackout when changing power. A
power pod encloses the entire "eye" of the instrument—lenses, eyepieces, and mirrors—in a single unit, protecting it from dust and other foreign particles. Working distance is constant at 4 inches without using lens attachments. A wide field of view lets the viewer see large parts of the specimen, per mits him to work on the specimen quickly and precisely. P-9
Accurate Discbarge of Radiochemical Liquids... HAMILTON MINIATURE DELIVERY SYRINGES
INDUSTRIAL MODEL
RESEARCH MODEL
LABORATORY MODEL
Cambridge pH Meters The three portable models illustrated above incor porate new and important advantages. A.C. line op eration eliminates battery nuisance. Laboratory and Research models use electron-ray tube for precise null-point indication. Industrial model is direct-reading, continuous-indicating; ruggedly built for plant use. A c c u r a c y : R e s e a r c h . 0 2 p H , L a b o r a t o r y .05 ρ Η, I n d u s t r i a l .10 p H C a m b r i d g e p H e q u i p m e n t a l s o i n c l u d e s s i n g l e - a n d multi-point indicators a n d recorders. Send f o r Bulletin 9 1 0 - M R .
CAMBRIDGE INSTRUMENT COMPANY, INC. 3 5 4 0 G R A N D CENTRAL TERMINAL, NEW Y O R K 1 7 , Ν . Υ.
Pioneer Manufacturers
PRECISION
of
INSTRUMENTS
Circle No. 36 on Readers' Service Card 86 A
·
ANALYTICAL CHEMISTRY
Now, accurate liquid discharges may be made in the range of 0.10 to 0.001 cc by direct read ing with Hamilton Miniature Delivery Syringes. Here are im portant Hamilton Miniature Syringe features: * 0.05 cc and 0.10 cc models * Tested for leakage at 150 psi * Precision bore glass * Stainless steel plungers
* Glass body shields P„ Also available with concentric cemented needles Order direct, or write for litera ture and prices today!
THE HAMILTON COMPANY 1134 Whitley Street · Whittier, California Dipt. Β A Complete Line of Precision, Radiochemical Handling Equipment Circle No. 52 on Readers' Service Card
