1 Industrial Hygiene Digest January, 1965 5 Institute of Environmental Sciences.

v ' Industrial Hygiene Digest January, 1965 53 Pesticides--> The Saskatchewan Experience.

19(6 Niiliomif .S'd/i'lv Ccni/^rr.v.t Chcmi-Tcmp.

1966 National Safely Cnnr/rm United States Safety Service Co., 1535 Walnut St., Kansas City, Mo. 64108 Industrial eyewear and hearing protection.

Industrial Hygiene Digest May, 1966 438 ~ '.e Behavioral Aspects of Safety.

FOUNDATION FACTS Robert T.

Lf Oc C=d Industrial Hygiene Digest COMING EVENTS February, 196'. 1 07 Mar. 1 - 3 International Conference on 'Malnutrition, Learning and Behavior, " Cambric Mass.

Industrial Hygiene Digest February, 1967 197 The Evaluation of Risks From Radiation.

24I Ida 14 A 1820 22 24 M ^M HEIGHT OF WALL IN FEET ww-m WS =5 2 2 S - - -- <*N M g N MM* w A #| p * I* ** 4 4 4 4 4 4 4 4 * NUMBER OF 6" COURSES M M 40 ** FiC 17-4 --Wind velocities that can be withstood by concrete block walls of varying height Courtesy The Travelers Insurance Companies Extenor masonry walls, especially of either load-bearing or nonload-bearing type what ever their height, are subject to wind loads be yond their designed capacity pnor to the final set of the mortar or final tie into the structure These wind loads have caused walls or sec tions of walls to break offand fall, causing both personal injury (sometimes fatal) and property damage Masonry walls should follow the erection of permanently installed structural members so that adequate lateral stability is provided If this is impossible or impractical, temporary bracing should be placed until structural members can be installed Usually the architect will include in his de sign pilasters as well as the requirements for anchors and ties Also local building codes require that during erection ofwalls the proper bracing and supporting shall be provided The question is, what is proper During construction of extenor masonry, two external forces should be considered --the weight (vertical) and the wind load (horizon tal) Because the vertical load is supported by spandrels and relieving angles, the cntical consideration is the honzontal load Pro tection or bracing for this load must be pro vided either by screening or by simple shoring Codes and other engineering data indicate the thickness and height of walls which will withstand specific wind loads while unsup ported These specifications should be checked against the local wind conditions and bracing provided when required (See R W Armstrong citation m "References ") The National Building Code (1967 Edition) requires the following Dunng erection masonry walls shall not be built higher than 10 times their thickness unless ade quately braced or until provision is made for the prompt installation of permanent bracing at the floor or roof level immediately above the story under con struction 431

FlC 44-26 --Observing laser light Above Par allel ravs of a laser may be focused to a point image bv the eve Below Rays from an extended source (as from a conventional lamp, or rays from a diffuse reflection of a laser beam) produce a sizeable (and less dangerous) image at the retina tion of a laser beam) produce a sizeable image at the retina Light from a laser entenng the eye is concentrated 100,000times at the retina Because of this focusing effect, the eye is by far the organ of the body most subject to dam age Hence, injury to the skin is seldom of concern except in dealing with very highpowered lasers Exposure criteria.

usiria-' Hvjiene Digest tend to succumb to mesothelioma, after man/ years of such contact.

V Mr GUI UNIVSltY MON I #1 A l Depart*** it of Epidemiology ana Health 1033 Pine Avenue West, Mcntreal 2, P.Q. 31st Hey, 1965.

MINUTES of the ^UttjUAIr: MEETING NATIONAL INSULATION MANUFACTURERS ASSOCIATION Absecon, N.

Headquarters Accounting Center September 30, 1963 Denison Finance Managers Own-Make Asbestos Fibre Prices for January 1964 As it will soon be necessary to compute standard unit costs for 1964, we are taking this opportunity to advise you regarding own-make asbestos fibre prices for January 1964.

United States Patent Office 759,158 Registered Oct. 29, 1963 PRINCIPAL REGISTER Trademark Sr.