Ihras el these ltaaa - C91 V FI, C91 V F2, CU V 13 * axaaspecllicaeioa tteea, therefore toe lead cannot he renewed sad still aeet apeeilteetloa. tr.

(THE METABOLISM OF LEAD) \ N15301 eri i O o Id * Dear Don: I am sending two copies of a progress report which has just been finished, in which a positive response has been obtained to the exposure of Subject S.S. to lead in the concentration of 20 micrograms per cubic meter of air.

Moreover*, low lead coneentration in the urine might be said to have come about as the result of poor performance on the part of the kidney even in the presence of sizable quantities of lead.

VC lead man is responsible. 7.

Under thrive circumstance* no practical amount of air could be removed from the laroth to red ice the lead concentration to a /.fc level, and therefore i; is neccssarj that the men working therein be provided with adequate personal protective de vices.

RPG announces no-lead, no-asbestos brake shoe ditionally the world's brake shoe ovator, Abex Corporation's Railroad ducts Group introduced last month its ond new brake shoe in recent years.

We just received a new Lab Request to formulate a Lead-Free Yellow Gasket Lacquer which is partly completed and looks okay.

Leaded Steel - V.

Wilmington, Delaware EXPLOSIVES Blasting Powder Blasting Supplies Charcoal Clay Mining Farm Explosives Q Industrial Dynamites Land Clearing Permissible Explosives Refined Nitrate of Soda Road Building Saltpetre Tree Planting Q Wood Pulp SPORTING POWDERS Black Sporting Powder Hand Trap Hunting Q Pistol Smokeless Powder Resort Shooting Rifle Smokeless Powder Shooting in Colleges Shooting on Boats Smokeless Powder Trapshooting PAINTS Automobile Finishes Q Barn and Roof Paint G Colors in Oil Q Concrete Floor Paint O Concrete Paint Enamels Flat Wall Finishes Floor Paints Floor Varnishes Floor Wax House Industrial Paints Japans Q Marine Paints Metal Preservative Paint Mill W'hite Railway Paints Red Lead Shellac Shingle Stain Smokestack Paint O Structural Varnishes Varnish Stain Finishes Wagon and Implement Paints White Lead in Oil Wire Screen Paint Wood Filler Wopd Finishes Q Wood Stains PIGMENTS Artificial Vermilion Dry Colors G Litharge G Litbopone Q Pulp Colors Q Rubber Makers White Q Toiuidine Toner White Lead G Zinc Chromate CHEMICALS Acids G Alums G Barium Chloride G Belt Cement G Benzol Products Q Bronze Powder G Bronzing Liquids Q Carpolene (W'ood Preservative) G Carpo (Metal Paint) Coke O Creosote Q Dead Oil Distilled Water G Ether G Heavy Chemicals Q Household Cement G Leather Renewer G Leather Substitute Solutions G Mantle Dips Metal Lacquer Nitre Cake G Pariodkm G Patent Leather Solutions G Pegamoid Aluminum Paint G Pitch G Pontar Pontoklene O Py-ra-lin Enamels Pyroxylin Solutions Salt Cake Q Shingle Oil Solvents G Split Leather Solutions G Waterproof Cement Wood Lacquer PY-RA-LIN Brushes O Challenge Cleanable Collars Colored Sheeting G Combs G Desk Sets G Manicure Set* G Mirrors G Novelty Sheeting Py-ra-lin Rods and Tubes Q Py-ra-lin Specialties G Py-ra-lin Toilet Goods Toilet Sets G Transparent Sheeting COATED TEXTILES D Auto Truck Special Fabrikoid Book-Finish Fabrikoid Buggy Aprons Q Craftsman Fabrikoid G Fabrikoid for Baggage Fabrikoid for Home Uses Fabrikoid for Railroad Uphol stery and Vestibule Curtains G Fabrikoid for Upholstering Q Fabrikoid Sheeting Fairfield Rubber Coated Cloth Hat Sweat Material Marine Special (U.

., Name (Trade') Basic Carbonate White Lead Paste Replaces Card No.

A muse or other specially trained person can secure basic data from the ex aminee, such as height, weight, age, and the history Nurses may also assist m other portions of the examination when specially trained and authorized to do so This relief from mmor details will give the physician more time to devote to an analysis of the whole man Custom requires that a nurse or other female attendant be present when women are being examined Health problems of women There is no reliable evidence to support the view that women are more susceptible than men to occupational health hazards, except during pregnancy The policy of some companies is to dis miss women on learning of their pregnancy As a result, women may conceal their con dition until it becomes obvious, frequently not until the last half of the pregnancy Since the early months present die danger of spontaneous abortion, it is desirable for women working during this period to be under the supervision of the medical depart ment A pregnant woman should consult her own doctor, and a report of her condi tion should be given to the plant doctor so that he may determine the advisability of her continuing to work Lead exposure preceding pregnancy is po tentially dangerous, since lead concentra tion in the blood, tissue, and body fluids re mains in the system for many months Because of change in the physiological mech anism of women dunng pregnancy, preg nant women might be adversely affected by exposure to concentrations of toxic sub stances which would otherwise be safe Chemical substances, such as carbon mon oxide, cbiorolorm, phosphorus, and roercurv, which pass through the placenta, may pro duce harmful effects on the fetus and lead to abortion * Occupational health nurse Occupational nursing is a distinct branch of the nursing profession The position re quires a qualified graduate nurse, who is licensed m the state where employed In addition, it is desirable that the occupational health nurse have some knowledge of work men's compensation laws, insurance, health and safety laws, occupational diseases, sani tation, first aid, and record keeping The occupational health nurse works with the physician m the plant and is his repre sentative when he is away.

Where neither side of the circuit is elec trically connected to the work, open circuit voltage of 300 volts is allowed if controls are present to prevent the operator from touching both sides of the circuit One hand should be used to operate control devices Also, the voltage should be disconnected automatically by a reliable switch instantly upon breaking the arc For AC welding under wet or humid at mospheric conditions where perspiration is a factor, a reliable automatic control device for reducing no-load voltage is recommended Cables Welding cable is usually purchased in 50-ft lengths, and several lengths may be used in one circuit Substantially insulated connec tors, or a capacity at least equivalent to that of the cable, should be used to splice or con nect cables Cable lugs used for connections should be securely fastened together by more than one bolt to give good electric contact The exposed metal parts of the lugs should be completely insulated Welding cable is subjected to severe abuse if it is dragged over work under construction and across sharp comers, or run over by shop trucks Special cable with high quality insu lation should be used The fact that welding circuit voltages are low may lead to laxity in keeping the welding cable in good repair Operators and maintenance men should be instructed to see that defective cable is im mediately replaced or repaired On large jobs, there is likely to be much loose cable lying around Welders should keep this cable orderly and out of the way, preferably strung overhead to permit the pass age of persons and vehicles Welding cables should not lie m water or oil, m ditches or bottoms of tanks Rooms in which arc weld ing is to be done regularly should be permanendy wired with enough oudets so that ex tension cables will not have to be strewn about Electrodes and holders Arc welding is done with either a metallic or a carbon electrode The carbon electrode is usually a solid carbon or a graphite pencil, Vi in in diameter or larger, depending upon the amount of current used For gas-shielded metal arc welding, the i Fig 31-7 --Fully insulated electrode holder on the electrode lead and the ground clamp on the work lead have insulated locking-type plugs for connection to receptacles on the welding machine Courtesy Westinghouse Electric Corp electrode is a solid or cored bare wire For shielded metal arc welding, the electrode is a covered wire Electrode holders are used to connect the electrode to the welding cable supplying secondary current Fully insulated holders (Fig 31-7) are preferred because there is less likelihood of accidentally striking an arc with such holders, particularly in close quarters Electrode holders will become hot during welding operations if holders designed for light work are used on heavy welding, if connections between the cable and the holder are loose, or if ground connections are poor If a holder of the correct size for the elec trode cannot be used, an extra holder should be provided so that one can cool while the other is in use Dipping hot electrode holders in water should be prohibited On light or medium heavy work, where 935

Gypsum objects to these Interrogatories to the extent they ask for "identification" of voluminous documents on the ground that they are overly broad, unduly burdensome and not reasonably calculated to lead to the discovery of admissible evidence.

No evidence of excessive lead absorption.

It must be remembered that, the molding sand cor tains particulate lead, and that excessive dust In association with the handling of the sana can produce an elevated lead concentration in the atmosphere. '-.Ye overall air flow must be directed from clean areas to these of potentially high concentration and thence to the outside.