In the past, crocidolite and acosite were used far core extensively in the United States than they are todav The leading producers of chrysotile liter are Canada and tha Soviet Union, with smaller deposits being found in South Africa, Rhodesia, China, the United States and Italy.

B ig g s' office Su b ject: Tetram eth yllead and lead an tikn ocks u se Agen da: In trodu ction of m eetin g R ep o r t on y e a r 's field stu dy of th e m ed ical asp e cts of TM L Su m m ary r e p o r t of ap p lication w ork don e in con n ection w ith co n cen tr atio n s of le ad an tik n ock s up to 4 .2 3 g:n s P b / gallon D iscu ssio n and Con clu sion s Adm . 3 .

We are on the trail of some promising leads to solve this problem

The following diseases only shall be deemed to be occupational diseases: (a) Poisoning by: (1) Aluminum Trioxide; (2) Arsenic; (3) Benzol or its homologues and derivatives; (4) Beryllium; (5) Cad mium; (6) Carbon Bisulphide; (7) Carbon Dioxide; (8) Carbon Monoxide; (9) Chlorine; (10) Cyanide; (11) Formaldehyde; (12) Halogenated Hydrocarbons; (13) Hydrochloric Acid; (14) Hydro fluoric Acid; (15) Hydrogen Sulphide; (16) Lead; (17) Manganese; (18) Mercury; (19) Methanol (Wood Alcohol); (20) Methanol Chloride; (21) Nitrous Fumes; (22) Nitric Acid; (23) Petroleum or Petroleum Products; (24) Phosphorus; (25) Selenium; (26) Sul phuric Acid; (27) Sulphuric Dioxide; (28) Sulphur Trioxide; (29) Tellurium; (30) Thallium; (21) Zinc; (b) Anthrax caused by handling of wool, hair, bristles, hides and skins; 381 Art. 8306 20 workmen's compensation (c) Blisters caused by prolonged or repeated use of tools or me chanical appliances; (d) Synovitis, Tenosynovitis, or Bursitis due to an occupation involving continual or repeated pressure on the parts affected; (e) Chrome ulceration; (f) Compressed air illness; (g) Dermatitis; that is, inflammation of the skin due to oil, cut ting compounds or lubricants, dust, liquids, fumes, gases or vapors; (h) Diseased condition caused by exposure to x-rays or radio active substances; (i) Diseased condition of the eyes due to electric arc and weld ing, and cataract in glass workers; (j) (Epitheliomatous cancer) or ulceration of the skin or the corneal surface of the eye caused by tar, pitch, bitumen, mineral oil or paraffin or any compound, product or residue of any of these sub stances; (k) Glanders and other diseased conditions caused in handling any equine animal or the carcass of any such animal; (l) Infectious or contagious disease contracted in the course of employment in or in immediate connection with a hospital or sana torium in which persons or animals suffering from such disease are cared for or treated; (m) Nystagmus incurred in underground work; (n) Asbestosis; (o) Silicosis; (p) Psittacosis (ornithosis) caused by the handling or processing of meat and poultry.

The seminars held at the offices of Johns-Manville during the summer demonstrate to -the asbestos'cement manufacturers the size of such problems, cnc have lead to the creation of this Health & Safety Council.

The seminars held at the offices of Johns-Manvllle during the sumet demonstrate to the asbeseos cement manufacturers ehe size of such problems, end have lead to the creation of this Health A Safety Council.

The exact equivalent length of the various fittings cannot now be determined since the pipe sizes of the building main, riser, and branch leading to the highest fixture are not known as yet, but a first approximation is necessary in order to make a tentative selection of pipe sizes.

Schroeder Twenty-two metals found in the air are derived principally from the burning of coal and oil; cadmium, nickel, and lead present real public health hazards.

Approximate Unit Thermal Conductivities* Conductivity, k Btu per (dr) (sq ft) (F dog per fiv) Material k Material k Lead................. 240.0 Brass (70 - 30) ..

The latest of the Hygienic Guides are enclosed: Acrolein, Aluminum, Ethylene Glycol Monoethyl Ether, Manganese, Petroleum Naphtha, Pyridine, Tetraethyl Lead, Allyl Alcohol, Allyl Chloride, Cyclohexane, Ethyl Chloride, ana Triorthocresylphosphate.

A clinical evaluation leading to a diagnosis and recom mendations will be made.

could explain an increaxd frequency of pleural plaques in exsmokers because damaged clearance mechanisms unaided bv continued smoking may lead to higher "effec tive ' doses of asbestos in the tissues.

Dow Chemical, a major vinyl I feedstock prices at "abnormally low levels," leading producers to in crease exports of these products to more lucrative foreign markets.

u s e d t a b l e ware y i e l d l e s s th an 3 parts o f lead per m illio n parts o f th e e x tra ctin g dia, w h ile a fin din g o f so re than 6 p arts per m illio n i s rare .

He suggested that if opposition were to be ex pressed to the Government's continued operation of such a company in competition with privately owned companies, MCA should concern itself, but the matter was not of sufficient general concern for MCA to take the lead in pushing for such expression or action.