File:Bell telephone magazine (1922) (14754084054).jpg

Identifier: belltelephone7273mag00amerrich (find matches)
Title: Bell telephone magazine
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept
Subjects: Telephone
Publisher: (New York, American Telephone and Telegraph Co., etc.)
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

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jectile used to measure Arctic ice. Willis Whitfield, is particularlypleased at the large number of hos-pitals that are making use of thetechnique in operating rooms. Thefirst time laminar air flow wastested under surgical conditions wasin an operation on a dog in 1962. Itwasnt until 1966, however, that thenations first laminar air flow oper-ating suite was opened at Albuquer-ques Bataan Memorial Hospital.Now, hundreds of hospitals all overthe world are installing such suites. The principle of laminar air flow,like most great inventions, is sim-ple. A carefully controlled supply ofair is sent through a bank of highlyefficient filters, which remove allparticles over a millionth of an inchin diameter from the air. This super-clean air is gently pumped downover the work area in uniform layersor laminations at a speed of approx-imately one mile an hour, carryingaway through floor grates virtuallyall airborne particles. Western Electric uses the princi-ple in many of its clean rooms, as do
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most other micro-electronics manu-facturers. In addition, NASA usessuch a room for the assembly ofspace vehicles, and pharmaceuticalhouses find similar facilities usefulfor the preparation and packagingof certain drugs and antibiotics. Along related lines, Sandias Bio-systems Research Department hasbeen hard at work investigating theeffectiveness of still another steril-izing technique—thermoradiation—which is the simultaneous applica-tion of heat and gamma radiationto kill certain bacteria. The synergistic sterilizing effectproduced by simultaneously apply-ing heat and radiation has beennoted by various investigatorsthrough the years. However, no sys-tematic analysis was made of thephenomenon until early 1969 whena Sandia research team, supportedby NASA funds, began to study itas a possible means of sterilizing in-terplanetary spacecraft. By late 1969, the Sandia teamhad not only found that thermoradi- ation is effective against severalbacteria, but that it substantiallyshortens

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