' I note what you say in regard to the report on the lead manufacturing plants, and I shall make quite certain that this information is passed on to noone other than Cassells and Fossett.

Their problem is that of the elimination of the hazards of lead Dr.

., as chronic lead poison in g.

Mg# P b / Lite r - 73*3 gelatin ous Material ' To ta l Lead - 684 PPM The concentrationof lead la these samplecorrespondapproximatelyto that of g&ooiinwhichcontain: 1mi oftetraethyl loadper gallon.

Stecher, Manager Tetraethyl Lead Division .

CAUTION-COMBUSTIBLE; CONTAINS LEAD.

You are probably aware that historically Switzerland has been very cautious in permitting the a3s of tetraethyl lead and continued to demonstrate reluctance to do so long after the use of tetraethyl lead was widespread in other countries.

In connection with cases of lead poisoning.

If you would like to prepare something on lead poisoning would you mind letting us know at your convenience?

Heretofore Aviation Gasoli ne has been the only product blended with lead and there has been no actual or probable need for a doctor having qualifications other than those directly relating to the examinations and care of the men doing the blending.

^ir..v., / ' ^5T*l5^'^ .'.4 ;, AHACONDft LEAD PRODUCTS COMPAMY NEW YORK.

Some specific precautions for prevention of electnc shock are 1 In confined places, cover or arrange cables to prevent contact with falling sparks 2 Never change electrodes with bare hands or wet gloves, or when standing on wet floors or grounded surfaces 3 Ground the frames of welding units, porta ble or stationary, m accordance with the National Electrical Code With a small welding unit, a primary cable containing an extra conductor, one end of which is attached to the frame of the welding unit, can be used By means of the proper po larized plug, this ground connection can be earned back to the permanently grounded connection m the receptacle of the power supply 4 Arrange receptacles of power cables for portable welding units so that it is impos sible to remove the plug without opening the power supply switch, or use plugs and receptacles which have been approved to break full load circuits of the unit 5 If a cable (either work lead or electrode lead) becomes worn, exposing bare con- 963

> Jjj Oil and Turpentine White Leads fc\ Miscellaneous

-* < 182*70 - tor frolght ohargee on' on* ear iaaoonle white lead fro* ..

The results are -within normal limits and would indicate that there had been no recent significant exposure to lead.