EQUIPMENT
ANALYTICAL CHEMISTS at Ph. 0. & M. S. levels For research and development of methods of anal/sis of unusual and ultra pure materials. The materials research program in the Research Laboratory of Texas Instru m e n t s I n c o r p o r a t e d is e x p a n d i n g rapidly t o meet the company's needs for m o r e a d v a n c e d materials t o be used in its electronics activities and to be offered f o r sale as chemical prod ucts. As a result, e x c e p t i o n a l oppor tunities exist for analytical chemists interested in w o r k i n g in an environ ment where chemistry, metallurgy, chemical e n g i n e e r i n g , p h y s i c s , and electronics meet. You will be working with a company w h e r e r e c o g n i t i o n of individual achievement has contributed to its 20fold growth i n the last 10 years — to a current volume of over $67 million. Texas Instruments—leading manufac turer of s e m i c o n d u c t o r products and foremost producer of semiconductorgrade silicon — is a 28-year-old pioneer and leading supplier of geophysical ex ploration services and instrumentation. TI is p r e s e n t l y engaged in design, development and manufacture of elec tronic components, instruments, optics, and military apparatus. The TI plant is within Dallas, yet away from d o w n t o w n traffic . . . within 5 minutes of fine r e s i d e n t i a l a r e a s , c h u r c h e s , a n d public a n d p r i v a t e schools. Y o u r home will be within 15 minutes of locally-sponsored sym phony, summer musicals, theatre-int h e - r o u n d , art m u s e u m , a n d m a n y other cultural amenities.
y Wrought Iron Ups Defense Against Corrosion A n e w wrought iron, christened 4-D, has been developed b y A. M . Byers C o . The metal is given increased corrosion resistance, the company says, b y increasing the deoxidation of t h e base metal, increasing the phosphorus content in relation to the other material components, a n d using a more siliceous silicate fibrous mate rial. Here, in a key manufacturing step, two workers add a reducing agent to the blown metal. Later, the metal will b e transferred to a process ladle a n d t h e n compounded with an iron silicate slag mix. Ε1
T h e IR-7 will cost around $19,000. It combines a replica grating and a single prism in a double-beam, doublemonochromator optical system. It uses automatic order-changing to get a conOther a d v a n t a g e s include companytinuous spectrum from 650 wave numsponsored insurance, p e n s i o n , and bers to 4000 wave numbers. p r o f i t - s h a r i n g plans. . . p l u s yearT o take advantage of the high resoaround living in the pleasant climate of lution of this instrument, you purge the the Southwest. case with dry, C0 2 -free air or nitrogen Write to to eliminate the interfering absorptions of carbon dioxide a n d water present in D R . R. C. S A N G S T E R ambient air. Director of Materials Research T h e IR-7 is not t h e ultimate in highresolution infrared spectrophotometers, TEXAS INSTRUMENTS I N C O R P O R A T E D Beckman points out. Workers at N a tional Bureau of Standards, for examÉBL® 6000 LEMMON AVE JBttk DALLAS 9, TEXAS ple, have gone well beyond 0.3 w a v e number. But such instruments are bulky, very expensive, and h a r d to use
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compared to t h e IR-7 (a case in p o i n t manual vs. automatic order c h a n g i n g ) . Beckman chose its resolution level (0.25 wave number theoretically, a n d limited by the optics) -to give a machine of readily-handled size, to use electronic gear a n d systems already in p r o duction, and t o allow modification of the IR-4 at a cost of only $4000 to $5000. As with other n e w instruments with capabilities beyond those already in the field, this one ΛΥΠΊ find many uses n o t yet thought of by Beckman. But some can b e foreseen. For refined study of steric configuration of biologically ac tive chemicals such as antibiotics, p e s ticides, and t h e like, the IR-7 is wellsuited. However, most of this work will b e
EQUIPMENT done b y spectroscopists, not chemists, in t h e beginning. A researcher will not find a n y spectra in t h e literature which look like those h e will get from this instrument. This is a disadvantage to the chemist, but not particularly to the spectroscopist w h o knows w h a t he is working with a n d is looking for struc tural information. T h e chemist, looking for content or for identification, needs reference spec tra for comparison. But h e can run this machine so fast ( u p to three times as fast as the IR-4 for a given resolution) that h e can get m a n y more scans per day.
• Reinforced plastic
rods a n d
tubes
can n o w b e h a d from Plasteco in lengths u p to 8 ft. and diameters up to 8 in. T u b e s can have any wall thick ness. Resins used to make the rods a n d t u b e s include epoxies, polyesters, phenolics, and diallyl phthalate. Re inforcements m a y b e of glass, cotton, Dacron, Nylon, Orion, or paper. T h e tubes will take 10,000 p.s.i. external pressure at 300° F . , company says. Ε 2
testing, and production control unit for accelerating natural sunlight effects on materials. T h e Xenotest P L 3 9 3 model uses a xenon lamp with niters t o give a sunlight intensity a t t h e specimens of about 15,000 ft.-candles. Ε 6 • W e a t h e r i n g t e s t e r , now available from G . F . Bush Associates, is a re search, testing, a n d production control device for accelerating effects of natural sunlight, h u m i d i t y , rain, and tempera t u r e in repeated p r o g r a m s . T h e Xeno test W P L 3 9 4 model controls relative humidity b e t w e e n 20 a n d 9 5 % , tem perature b e t w e e n 100° and 150° F . T h e unit offers preselected program ing of light and rain. Ε7 • Constant-temperature bath, now made by Labline, has stainless steel
F u r t h e r useful i n f o r m a t i o n on k e y e d Equipment ifems m e n t i o n e d is r e a d i l y a v a i l a b l e . . . Use handy coupon en page 708
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Every w e e k C&EN's editors survey a l a r g e volume o f valuable scien tific, technical, and business information issued i n the form of product announcements, booklets, catalogs, d a t a sheers, etc. This material is d i g e s t e d a n d presented in several departments. For y o u r conven ience this coupon is p r o v i d e d t o f a c i l i t a t e requests f o r further i n f o r m a tion on these items as w e l l as on products and services mentioned in advertisements. Name
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• N e w ultrasonic c l e a n e r , offered b y Labline, comes with either one or t w o tanks, each 6 V 2 by 16 b y 10 in. T h e power generator operates a t 35 to 4 0 kilocycles p e r second a n d averages 2 5 0 watts output. Ε 4 analytical
• Density s y s t e m , manufactured b y In dustrial Nucleonics, measures a n d con trols fluid density, specific gravity, per cent solids, or related quantities. T h e AccuRay unit uses the principles of g a m m a ray transmission from a radio isotope and makes no physical contact with the material. Accuracies of ± 0 . 0 0 1 to =t0.O03 specific gravity are possible, t h e company says. Ε 9
March 3, 1 9 5 8
• Arsenic trisulfide g l a s s , from Servo Corp. of America, may b e molded, ground, a n d polished to produce onepiece domes. T h e domes are used in transmitting infrared radiation to infra red detection equipment a n d are avail able in sizes from 4 to 12 in. in diam eter. O t h e r rounded shapes u p to 180° may b e ordered. Ε 3
• New
chambers 1 3 by 12 b y 7 in., with a tem p e r a t u r e range u p t o 100° C. Ε8
balance, by
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C U P C O U P O N — F o l d A l o n g This Line
-State-
type) Fasten (Staple, Tape, G l u e ) — M A I L
3c
Wm.
Ainsworth & Sons, automatically r e cords instantaneous weight and rate of weight change. Weight changes for long or short periods are recorded on a chart 11 in. w i d e which represents 110 mg. Capacity of the unit is 200 grams. T h e balance automatically adds or s u b tracts weights as necessary to rescale recorder pen. Range of automatically controlled weights is 4 grams. Ε 5
