.,.. are available in Everdur Examination showed no pitting of samples , and an average corrosion rate of .000395 Alloys from leading manufacturers.

Ask for our sur vey of a leading stock In th e field of elec-tronics.

Heat (14 years old), formerly the leading competitive publications in the oil heating industry.

coiner spouts leading to stokers, ,'pgis lure, or hsmmermills and directly oaSj hoppers of coal pulverisers.

A potentio meter balances the electromotive force against a known electromotive force with no current flowing, hence this method is independent of length and variations in resistance of leads.

Research Report 831-38*292 (S.W.Runt>el) on Analysis of Belbasio lead Liquor* 2* Reasoroh Report KS*33*884 (B*C*Mefcrtng} on m1 Yield of Y0*263*D. 3.

Dear Doctor Smead* I hasten to reply to the last two paragraphs in your letter of October 20 - This Laboratory had its beginnings in the middle 1920*s, when I and my associates began, the investigation of the toxicity and hygienic potentialities of tetraethyl lead, with respect to the manufacture, distribution and use of this material and in the use of gasoline containing it, as a motor fuel.

Free Silica u found in some e benign fibrosis' of various dusts aders rubber ating work- tion workers kers ill openers o mixers men clay and 1 ss workers makers Mid makers d cutters ~ rock Hypers -wheel makers ers stationary ers LIST OF HAZARDS SYMPTOMS ETC. 25 Mica strippers or splitters Sandpaper makers Fertilizer makers Saw filers Mica workers File cutters Mineral workers Sawyers stone Filers Scissors sharpeners stationary Firemen ) Miners Scouring makers Mixers rubber ) Flint workers workers workers Scrapers foundry Flue cleaners Mixing Screen workers lead and foundry Foundry workers miscellaneous Mold breakers ) zine smelting Furnace workers Sifters Glass blowers Molders foundry Sintering workers Paint removers Glass cutters Slag workers Glass finishers Paper hangers Slate workers furnace workers Phosphate workers Planer stone Slip makers pottery Glass mixers Smelter workers Glaze mixers pottery metal Smoothers glass Gold beaters Plasterers of Paris workers Soap abrasive workers Gold refiners Plaster Pneumatic workers Stamp workers Graphite workers Polishers metal Statuary workers Grinders metals Stokers Grinding wheel makers Polish makers Stone artificial makers Gypsum workers Pottery workers Pouncers felt hats Stonecutters Horn workers Stonemasons Insulation sound heat Printers Stone workers ; Putty makers Irwonoraknedrssteel mill work- Putty polishers glass Street cleaners Street repairers ers Pyrites burners Sugar refiners Jewelers Quarrymen Sulphur burners Junk metal refiners Road repairers workers Table turners enamel- material Jute workers Lapidaries Lime burners Lime chargers Lime workers Linoleum makers Lithographers Marble cutters Masons factory workers Metal turners Rubber workers Sagger makers Salt preparers Sand blasters Sanders machine opera- tors Sandpaperers enameling and painting auto bod- ies etc.

Of the first-flight dust foes -- there are not so many -- lead, mer cury, arsenic, manganese, fluorides, etc., silica is the archfiend.

smeos^ It may be uil that them Is a very general accord among the leading inverigstors and research authorities in the opinions and ccseJusions presented at the inttmiuonal conferences oo silieosiu (Johan* . ' Besburg, August, 19J0; Cenrvm, Anprit aod-Srptemher, 1SJ1J Such a- difftrmees of'opinion as may ce expressed from time to time do not seriously effect the general agreement on the basic factors affecting the cause, incidence, effects, ikl prognosis of The eiTrct of silica upon the Kings depends on the nature and extent of exposure.

I acquainted him with the developments over some little period of time, with the difficulties that have contributed to some decline in the hygienic status of these plants, and with the recent developments which have led to immediate and careful re-examination of all factors that contribute to the lead exposure of theworkmen In these plants.

The factors leading to high air motion are exces sive velocity, high air volume per square foot of. floor area, overblow, striking of beams causing a spilling of the air into the zone of occupancy, and heating in severe climates by means of ceiling outlets which are directed downward. 4.

Aprilf 1947 M-P 4 More .Companies Join Foundation Thirteen organizations have affiliated with the Foundation since the first of this year, including some of the nation's leading industrial concerns.

Texaco Una Oils are approved by all leading Diesel menu* 4 facturcrs and you can get them for every type, she and ,* speed of engine.

Where exact performance data are not available this assumption is a desirable', one since it leads to a conservatively large determination of the power required.