Certain sections of the building, such as offices and rooms which are partitioned off from the larger areas, may be heated by ducts leading from indirect heating units supplied with hot water in parallel with the unit heaters.

In each varnish 0.5$ lead and 0.05$ cobalt in the form of naphthenates was added as a drier.

Ts-taa cn.ii Great 2r:t- March 22--Two leading cancer^ recent years, including cnemi tain.

-Of course. where the required heating surface is estimated by-empirical or rule-of-thumb methods, refinements in approximating fuel consump tion are not warranted, but rule-of-thumb methods often lead to unsatis factory results and should be avoided in heating work where more accurate methods are available.

., Chicago, 1111.................................. 1076-1077 Eagle-Picher Lead Company, The, Temple Bar Bldg., Cincinnati, Ohio................. 1002 hret Magnesia Manufacturing Co., Valley Forge, Pa..................................... 1000-1001 ectric Air Heater Company, Division of the American Foundry Equipment Co., 3 677.Byrkit St., Mishawaka, Ind................................ ..... ..................................._____ 957 Hectrol Incorporated, 934 Main Ave., Clifton, N.

Sayerst I wi3h to eatress hearty thanks to you and those a t the Bureau t o f Mines who cooperated with you in the to x io lty study o f concentrated tetra eth y l j lead and i t s various dilutions in gasoline* I I t aaay please you to know that a number o f s c ie n tific men w ith whom I have talked at d ifferen t times, say that your work on the subject was un| questionably the fin e st pieoe o f work o f this general nature, from every stand po in t, including thoroughness, e ffic ie n c y , and technique, that has been undertaken or done by anyone or group of men.

NATIONAL LEAD COMPANY held at No.

Roosevelt, who had been associated several years ago with the national Lead Co. in tho manufacture of titanium pigment, wont over the history of the development of titanium and explained its uses in various industries.

This becomes dear as we review some of the terribly im portant military ond strategic facta: that Russia has the A bomb and probably the H bomb--that America must be top dog in atomio war potential so the fear of retalia tion will hold off any enemy attack--that every atomic power plant will be a producer of byproduct plutonium-- that the design, building and operation of atomio power plants will train many engineers in atomic techniques --that a "forced-draft" atomic-power program may lead to unpredictable atomic discoveries, and that these may become a matter of life and death to this notion--that a going atomic-power Industry will help America keep for eign suppliers of uranium on our aide.

Xational Lead C_ St.

w h it e Le a d , Ca r b o n at e a n d Su l p h ..t e Sl u e Le a o s u l p h .at e Reo LEAD Zin c , in p a s t e f o r k put t y 28.

He was l a i d o f f on December 1, 1935* On F e b ru a ry 9 1937 he f i l e d claim a g a in s t u s a l l e g i n g t o t a l d i s a b i l i t y by reason of lead poisoning -causing- atrophy of o p tic nerves of both eyes.

During this time period, I would conclude that the medical literature might lead the reader to the opinion that the association between asbestosis and lung cancer was now "probable". 3 Finally, the last time period is 1955 until the present,' This phase, of course, began with the publication by Richard Doll using the rr.ost valid epidemiologic techniques up to that time to investigate a causal asso ciation, i. a. , a cause-specific mortality study of workers with defined employment in a specific plant.

\vi, kt i Wal-i- and Carey *le lead off r S*ru .i I.'

ift Oxides: ft uw ft.in Lead oxide (PbO)__________ 0.055 0.168 ____ 0.191 0.231 Zinc oxide (ZnO)____ ______0.125 ft 77 Quarts..................-............ 0.17-0.28 ft 717 ... ___ 0.21 Sand... ___ 0.195 Sandstone- - ____ ,, 0.22 Talc_ ____ 0.209 LIQUIDS 0.51 0.58 0.49 0.40 0.23 0.54 0.56 0.50 0.576 Hydrochloric acid______ --_____ 0.60 0.50 0.31 0.40 0.033 0.40 Paraffin oiL_____ _ 0.52 0.498 0.336 0.94 0.40 0.42 Molten metals: Bismuth (535-725 deg. fahr)-- 0.036 0.041 0.235 Tin (460-660 deg. fahr.) 0.058 From Marks' Mechanical Engineers' Handbook.