394 CHAPTER 22 1965 Guide And Data Book it B temperature uf outer surface of iusul&ucu, Fah**bcst degrees.

664 CHAPTER?

728 CHAPTER 45 1965 Guide And Data.

766 CHAPTER 48 1965 Guide And Data Book Table 1 ....

V;:/']' ; Hie Catalog Data Section which follows contains the advertisementaof products available to meetlhe'design requirements as outlined;in the teart pages of this Edition."

^wpaaBroMww-1 Industrial Kvgieae Quest Aucait.

Meeting of Members.

IONIZING RADIATION Rfl 42-6 Radiation level near beta ray gouge used to measure thickness of steel strip is checked with a Geiger counter Courtesy Armco Steel Corp mabon One example is the employment of radioacbve sources to effect quantitative or dimensional control of industrial materials (for example, to measure fluid-flow rates, and thicknesses of semifinished or finished products) Sealed sources Sealed sources are avail able that have widely varying amounts of radioactivity A high intensity source may require so much shielding that it will not be portable Shielding, control devices, and procedures should be designed by someone experienced in such work Keeping external exposures to personnel under control should be easily accomplished with the aid of alarms, strict control of access, and thor ough monitoring (Fig. 42-6).

I // V HWBB-0020114 f3 fki Industrial Hygiene Digest INDUSTRIAL HEALTH NEWS LITERATURE ABSTRACTS MEDICAL ENGINEERING CHEMICAL TOXICOLOGICAL LEGAL APRIL, 1967 {Vol. 31, No. 4) C=3 INDUSTRIAL HYGIENE FOUNDATION MELLON INSTITUTE 4400 FIFTH AVENUE PITTSBURGH, PA. 15213 03122474 HWBB-0020115 o Igg UU C=3 03322475 Industrial Hygiene Foundation assumes no responsibility for statements in articles abstracted in this Digest or for material from other organizations which may be sent to members from time to time.

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1415 TH/MU 13 June. 1967 Mr.

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