choice of physicians, it has been observed that where the employer has already provided a well-organized medical service, workers seldom exercise this right Methods o!

Elements of Industrial Toxicology 1320 TABLE 42-B THRESHOLD LIMIT VALUES FOR 1968 (Continued) additive In the above example the limit for 20 per cent quartz is 10 mppcf For another mixture of 25 per cent quartz 25 per cent amorphous silica and 50 per cent talc 1 TLV = 025 025 05 = 73 mppcf 2 5 + 20 + 20 The limit for 25 per cent quartz approxi mates 8 mppcf Appendix C BASES FOR ASSIGNING LIMITING "C" VALUES By definition in the Preface, a listed value bearing a "C" designation refers to `ceil ing* value that should not be exceeded, all values should fluctuate below the listed value In genera) the bases for assigning or not assigning a "CM value rest on whether excursions of concentration above a pro posed limit for periods up to 15 minutes may result in a) intolerable irritation, b) chronic, or irreversible tissue change, or c) narcosis of sufficient degree to increase accident proneness, impair self rescue or materially reduce work, efficiency In order for the Committee to decide whether a substance is a candidate for a "C** listing, some guidelines must be formulated on the permissive fluctuation above the limit in terms of the seriousness of the re sponse in the categories a, b, c, given above For this the factors given in the table be low have been used by the Committee For both technical and practical reasons.

SOUTH LONDON PRESS May 13, 1969 TUMOUK A VTnniCT of pecidenm'. death was rerurnrd at South wark on Wednesday on a Dot herb if he man rm ai>- j working most of his li!

38--Industrial Toxicology Subject Date Published xnAlHA Journal 1,2-Dichloroethane (Ethyl Dichlonde) Rev Aug 1,1-Dichloroethane (Ethyhdene Chlonde) Rev Jan Dichloromethane (Methyl Dichlonde) Rev Dec Diethylamine June Diethylene Tnamine June Dusobutyl Ketone Dec Dimethylformannde Sept 1,1-Dunethylhydrazine Apr 2,4-Dmitrophenol Feb Dioxane Dec Diphenyl Oct Epichlorohydnn Dec Epoxy Resin Systems Oct Ethanolammes June Ethyl Acetate Apr Ethyl Acrylate Dec Ethyl Alcohol Mar Ethyl Benzene Rev June Ethyl Bromide Apr Ethyl Chlonde Oct Ethyl Ether Feb Ethyl Silicate Dec Ethylene Chlorohydrin Dec Ethylene Diamine Rev Feb Ethylene Dibromide Apr Ethlene Glycol Dinitrate Dec Ethyl Glycol Mono-n-Butyl Ether Oct Ethyl Glycol Monoethyl Ether June Ethyl Glycol Monoethyl Ether Acetate Dec Ethyl Glycol Monomethyl Ether Aug Ethylene Oxide Dec Ethylenunme Feb Fluonde Beanng Dusts and Fumes Rev Aug Fluonne Rev Dec Formaldehyde (Methanal) Rev Apr Furfural Apr Heptane Feb Hexachlorocyclohexane, Gamma Isomer-Lindane Jan Hexane Feb 2-Hexanone Dec Hydrazine Dec Hydrogen Chlonde Aug Hydrogen Cyanide Rev Feb 1965 1971 1965 1960 1960 1962 1957 1963 1958 1960 1964 1961 1958 1968 1964 1966 1956 1969 1965 1963 1966 1968 1961 1970 1958 1966 1958 1963 1965 1970 1958 1965 1965 1965 1965 1965 1959 1972 1959 1968 1956 1958 1970 Hydrogen Fluonde Mar 1956 Hydrogen Peroxide Sept 1957 Hydrogen Selemde Dec 1959 Hydrogen Sulfide Rev Feb 1963 Hydroquinone (1,4 Benz ) Apr 1963 Iodine Aug 1965 Lead and Its Inorganic Compounds Apr 1958 Lithium Hydnde Aug 1964 Magnesium Feb 1960 Maleic Anhydnde June 1970 Manganese June 1963 Mercury and Its Inorganic Compounds Rev June 1966 Mesityl Oxide Oct 1969 Meta-Dinitrobenzene Feb 1959 Metal Hydrides Feb 1960 Methyl Acetate June 1964 Methyl Alcohol Dec 1957 Methyl Bromide Apr 1958 Methyl Chlonde Dec 1961 Methyl Ethyl Ketone Mar 1957 Methyl Isobutyl Ketone Apr 1966 Molybdenum Naphthalene Feb 1960 Oct 1967 Nickel Apr 1966 Nickel Carbonyl Rev June 1968 Nitnc Acid Aug 1964 Nitrobenzene Nitroethane Feb 1959 Dec 1961 Nitrogen Dioxide Nitroglycenne Nitromethane June 1956 Feb 1960 Dec 1961 Nitropropane June 1960 Osmium and Its Compounds Oxygen Difluoride Dec 1968 Apr 1967 Ozone Parathion Rev Apr 1966 Rev June 1969 Pentaborane Rev June 1966 Pentachlorophenol and Sodium Pentachlorophenol Aug 1970 Pentaerythntol Pentane Petroleum Naphtha Phenol Phosgene Phosphine Phosphonc Acid Rev Feb Apr Aug Dec June June June 1968 1966 1963 1957 1968 1964 1957 Phosphoric Anhydnde Phthalic Anhydnde Polonium 210 Propanol Propylene Dichlonde Propylene Oxide Pyndine Rev Quinone (p-Benzoquinone) Radon and Its Daughters June Aug June Dec June June Aug Apr June 1958 1967 1959 1961 1967 1959 1963 1963 1959 Selenium and Compounds June 1959 1178

46--Safety Engineering Tables TABLE 46-1 STRENGTH OF ICE Load Ice Thickness Inches (min ) One person on skis One person on foot Group, sing'e file or Snowmobile Passenger car, 2 ton gross Light truck, 2'h ton gross Medium truck, 3'/ ton gross Heavy truck, 7-8 ton gross 13A 2 3 7'/i 8 10 12 Courtesy Snow, Ice and Permafrost Research Establishment, Corps of Engineers, U S Army Snowmobile data from "A Snowmobile Accident Study,' R W McLay and S Chism, 1969 NOTES 1) This table is for clear sound ice 2) Thickness must be increased and extreme caution used after spring melt starts 3) Snow ice--use 50% of thickness of snow ice as effective for table given Example 10 in snow ice plus 6 in clear ice gives 11 in thickness Medium truck all nght, but not heavy truck 4) Table does not apply to parked loads 5) Key to safety on ice is to disperse the weight over a large area, do not run vehicles within 50 ft of each other TABLE 46-J DESIGN WIND PRESSURES FOR VARIOUS HEIGHT ZONES OF BUILDINGS OR OTHER STRUCTURES (From Minimum Design Loads in Buildings and Other Structures, ANSI A581) Hetfiht Zone, feet W,nd Pressure pounds per sq ft Less than 50 50 to 99 100 to 199 200 to 299 300 to 399 400 to 499 500 to 599 600 to 799 800 to 999 1 000 to 1,199 1,200 to 1,399 1,400 to 1,599 1,600 and over 20 24 28 30 32 33 34 35 36 37 38 39 40 From Kent s MeehaniL.il En^meen, H indbnok (John Wiley i- Sum) WIND LOADS A minimum pressure in pounds per square toot is specified by all building codes as an allowance tor the effect of wind pressure against exposed surfaces of buildings The figures given are recommended in this report as mimmums These requirements do not provide for tornadoes because they are based on a design wind velocity of 75 mph corresponding roughly to a 5-min average of 50 mph (indicated 63 by a 4-cup anemometer) at 30 ft from the ground Special provision tor wind bracing is required for narrow buildings of even medium height and for all high buildings In towertike structures wind bracing should be planned in the early stages of design The overturning moment due to wind pressure should not exceed two-thirds of the moment of stability, disregarding live loads, except where foundations are securely anchored The possibility of a structure sliding on its foundation bed should also be considered In computing the wind load no allowance should be made for the shielding effect of other buildings All roofs should be designed to resist wind suction as well as wind pressure 1458

2- - We have labelled our product bags as an asbestos hazard since 1969, three years before the first Federal OSHA standards were promulgated to require this, air monitoring, medical surveillance and other safety precautions.

HI LI.

`he Office of Standards Enforcement (OSE) of the NHTSA has initiated a compliance evaluation program that created a commercial revolution in the assess ment of Quality Control activity by suppliers.

WHO WAS WHO IN AMERICA WITH WORLD NOTABLES VOLUME IV 1961--1968 Indexed to All Who Was Who Volumes A COMPONENT VOLUME OF WHO'S WHO IN AMERICAN HISTORY A compilation of sketches of Who's Who in America biographees as last published in Volumes 32 to 34 inclusive (1961-1968)--or in any earlier volume if not in hand for inclusion in previous Who Was Who editions (Volumes I, II, and III, 1897-1960)--with dates of death, interment locations, and any requested revisions appended.

Minutes: Air Hygiene L Manufacturing Committee October 8, 1964 Barbizon-Plaza Hotel, New York, N.

* 27.

' Group Policy No. follows: 65T7-C bearing date of------------Oecmaer 1.

STATE OF MASSACHUSETTS COUNTY OF MIDDLESEX.

210 1 Sayers 2 learned when you went on this fact-gathering 3 mission to leam about asbestos as a health hazard 4 in the United Kingdom?

TiMahnor Page 93 1 did not know about the dangets of smoking in ' 2 the 1960s.