I/EC
REPORTS
new experimental drug item, stimulates respiration, avoids complications, and thus reduces the death toll from overdoses of barbiturates, according to Dr. Melvin L. Bernstine of the Albert Einstein Medical Center, Philadelphia. Use of the compound in emergency patients deeply anesthesized by overdoses produced dramatic results within 12
AND
INTERPRETS
hours in most cases, he adds. Of the group treated with other stimulating drugs, Dr. Bernstine said: "Some of the patients required tracheotomy (incision through the neck into the windpipe) and all the deeper poisonings took several days to recover. In these cases there was also an appreciable percentage of complications and some fatalities."
Silicones for Sleuthing
SIX CASE SIZES ARE AVAILABLE. Fingerprints a r e lifted from a gun barrel using liquid silicone rubber. Material was poured over the print and allowed to set for five minutes b e f o r e removing the completed cast as shown
CONTACT YOUR NEAREST CLARK REPRESENTATIVE FOR COMPLETE INFORMATION OR WRITE CLARK
BROS.
OLEAN, NEW YORK
COMPRESSORS ENGINES · GAS
I TURBINES
CO.
A FLUID SILICONE rubber that sets up into a solid mass without heating offers a new chemical assist in the field of criminalistics. T h e material cures to a rubbery solid, ideal for casts of footprints, tire prints, or parts of the human body in accurate detail. It is also useful for lifting dust prints from hard surfaces, and excellent casts of fingerprints have been lifted even from irregular, contoured surfaces. Fifteen months ago (December 1958, p. 31 A) I / E C reported a dip method for fingerprinting developed by Atlantic Research Corp. This simply used nylon in a solvent. Dow's new silicone product R C 900, is simple to use, too, but involves two steps instead of one.
Here's how you do it: Carefully mix in the catalyst supplied with the material ( 0 . 5 % by weight) and the liquid is ready to apply by pouring or spreading on the surface to be reproduced. Because of its fluid nature silicone rubber flows into minute cracks and crevices to duplicate exactly the area to which it is applied. At 77° F. it cures to a rubbery solid in just five minutes. At lower temperatures it takes a bit longer. Casts can be made quickly without heat or water, and at all temperatures. Rubber castings are unbreakable, easily stored. High accuracy of detail markings is obtained, and additional reproductions can be made from the "master" without loss of detail. VOL. 52, NO. 3
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MARCH 1960
37 A
