Joat 1, 1958 SUBJCCTt TWELFTH AHHOAI &TTECT RESEARCH AKD UETCLOFMEOT CCKFSHEKCE To Wenber* of th Lead Industrie* Association!

HpJ:Mj8S9& Magnesia is the leading insulajuopjoa the market for temperatures up to jeOOF.'

^H ^H H ^had lead c o lic .

tii : NATIONAL LEAD C0KPAN1 0000-NLI- (HOARD OF DIRECTORS - JULY 2 s, 155c.)

. * Oct. 1953 Allergy (dust, asbestos) 1 Asbestos is -- cancer (dust, asbestos) Bronchitis (acids) Conjunctivitis (fluorine and compounds) Dermatitis if Epithellomata, multiple (x-ray) Hearing loss Poisoning (lead and compounds) 1 Silicosis (dust, free silica) 3 Silico-tuberculasis (dust, free silica) 28 1 I 1 4/* 1 f 5 4 62 5 In d. 1 Nov. 1953 1 9 Total 1 1 1 1 85 1 1 1 8 4 104 1.

I hope' to be able to make these observations the basis of some consideration of future lead plant Sites.

MATERIAL (a) Leaded 2ino Oxitee, (b) American Process Lead Free Zino Oxide, hereinafter some- time referred to a "lino Oxides," The materiel covered by this Agreement shall be the Seller's standard grease of product currently being offered its own trade, 2.

A* Kehoe (d a ta obtained from one normal in d iv id u a l exposed d a ily to f in e ly d iv id ed lea d oxide f o r two years)* An eq u ilib riu m , w ith re sp e c t to the twodraust concentration of lead, in th e blood and the axiom ra te of load e x cretio n in th e u rin e , was reached in aprroidlnatsly s ix months, a f te r which tho su b ject went along on a p latea u f o r the r e s t o f th e period* In th e two y e a rs , the' asupbejrepcxtimabtseolyrbe3d0 mapgpr(o-0x-i,mO-laitl-ei lmy s/d*am~) go*f"owf`hich Br* KeJS>e* s v d tk vim datse with, s ta b le le a d , but- J% 210 should behave - ' exactly the sane since there i s enough sta b le lead 'present in the tody to act as a carrier

The pressure used in those runs was 250 psi* It vas generally conceded that the SID system, per ee, vas usable but that the pressures cay have produced a crystalline structure vhlch from sacs standpoints night be desirable, but would lead to high conductance paths for heat and, therefore, give high tenperature rise in a fire test* The data obtained at Underwriters* laboratories bear out this last point* Crs.

of National Lead Company held at No.

Mines Department^ * # ' gALOOQRLlE* Produced in Asbestos Personal Injury Cases: Abrams lead and copied to Richard F.

The wide discrepancy in the appreciation of the degree of asbestosis by different patholo'gists leads to confusion, especially before a compensation board.

. *"| Texaco Ursa Oil scries is approved by leading enj"fl builders and preferred by operators everywhere.

Z37.4-1941 Manganese Chromic Acid and Chromates Mercury Z37.6-1948 Z37.7-1943 Z37.8-1943 Xylene Z37.10-1948 Lead and Certain Inorganic Lead Compounds Toluene Oxides of Nitrogen Methanol Z37.11-1943 Z37.12-1943 Z37.I3-1944 Z37.14-1944 Heat Transfer (Walls) Styrene-Monomer Formaldehyde x Methyl Chloride Trichloroethylene Thermal Conductance and Transmittance of Built-up Sections by Means of Guarded Hot Box (1949).

Joseph Lead Company Robert B.