These considerations in conjunction with those of barometric pressure and the difference in density of flue gases from that of air lead to the fol lowing formula: D, = 2.96 HR. (^-^) (1) 399

Lead 4.

It does not lead to disability or infection. (5) In estimating the possible effects of any given industrial substance, it is necessary to know its chemical nature. (6) It now appears that certain silicates which were once considered as inert may become noxious when subjected to high temperatures. (7) Certain metals when subjected to high temperatures, liberate their oxides which may produce chemical pneumo nitis. (8) An industrial environment per se does not induce tuberculosis. -- Author's summary 289 Pathogenesis of Industrial Pulmonary Disease.

When localized high velocities through the supply opening exist from this cause or any other, the noise produced will naturally exceed that which the supply opening area and average face velocity would lead one to expect.

Lead. ... ...

Fueloil & Oil Heat is leading the in dustry, attacking its problems, instruct ing and advising on technical matters, Governmental orders, facts and influences behind the news.

These considerations in conjunction with those of barometric pressure and the difference in density of flue gases from that of- air lead to the following formula: Dt = 2.96 HB0 r- .

Fuller Pure Paint protects because it is made of Pioneer White Lead, pure zinc, pure linseed oil and pure colors thoroughly ground, mixed and intermixed in correct proportions.

Joseph Lead Co. and Chairman of Foundation's Board of at eighth annual Trustees presented at Mellon meeting of Industrial Hygiene Foundation held Institute Pittsburgh Nov. 10 1943 1.

Owens-Illinois Class Coauaiy, in cidentally, played e leading part in getting this organisation started.

pioneered at the 1943 meeting pub- lliischaetdionsewpialrlatbeely from the remainderremainder of the Proceedings a year ago The next pub- E the panel discussion on Sickness ance The Engineering Section of the Indemnification or health insur- will be published program and the Legal Section also separately and eH ye Section will | Meeting Received Wide Attention or Nere The Ninth Annual Meeting received a national press Numerous news stories carried by the Associated Press United Press and their hundreds of client International News Service to devoted a lead newspapers throughout the country The WALL STREET JOURNAL article on page one to the meeting Meanwhile mumerous trade and tech- nical journals are publishing highlights of the meeting in their fortfh ort- hcomincomging issues Notable among these is a comprehensive AND ENGINEERING NEWS report scheduled by CHEMICAL ONE < ie States recentlFyoucnadlalteidon describing the Commerce describing ttention Meanwhile the Chamber of of the United tmtoexnitoiuosn to the Foundation's plant survey services for the control of noxious and exposures in the workplace and sent literature 330 its approximately 2,000 members ity th datenblatt .

The breeding lead is computed in pounds per square inch, using the amille cross-sectional erea at the breaking eaotion of specimen,, If in any case the result cf a single longitudinal or a single transvere* specimen is below specification requirement, it will be discarded and a r\ test made.

Eaeh observation covers a fall hour with readings every 15 sec onds, o total of 240 leading***p*er obser STACK OIII0III STACK Ol1I0IY1 vation.

It is impossible to install a water gage glass on an inverted bucket trap, but if visual inspection is necessary, a gage glass can be placed on the line leading to the trap.

Every effort is made to lead ventilation ducts so that they do not pass through such structures.