Extensive tests, covering all types of zinc oxides, leaded zinc oxides, mixtures of zinc oxides and basic sulfate white lead, or basic silicate white lead at oil levels from 3 3/h to 5# per gallon and zinc levels from 1.63 to 2.93# per gallon at three exposure locations Chicago, Kansas and Florida - show that the Ozlo ISM and Oslo 3$ impart greater mllrtov resistance to the paint than any other basic pigments.

Also a page of details which iirt'. tlc the oorrect nsthotLi of Installing lead shswer pans, lead vasts \ and vent for eirks under windows *nd a lead water service installation.

Porterfields Thank you for your letter of August 21, 1959 and the enclosed report of the Ad Hoc Committee on Tetraethyl Lead, .

Soar Sr* Kehoe, I hope you trill not mind my writing: to yon again in connection with the estimation of blood-lead*.

Extensive tests, covering all type3 of zinc oxides, leaded sine oxides, mixtures of zinc oxides and basic sulfate white lead, or basic silicate white lead at oil levels from 3 3/h to 5# per gallon And zinc levels from 1.63 to 2,?

Manfred Bowditch Lead Industries Association 420 Lexington Avenue Hew York City IT Dear Manfredi I have had an inquiry from Dr.

Some of these lead poisoning cases have been handled by the St.

Bessman's method for lead analysis since the beginning of our lead work.

In fact the figures reported giving "lead poisoning* should have been characterised as the cosher cf octal nine vorhers vho reported a past history of lead poisoning up to the date of the study.

LEAD INDUSTRIES ASSOCIATION 4M LJUUNOTON AVCMUS 9 NEW VOM 17, H.

LEAD INDUSTRIES ASSOCIATION 4M LJUUNOTON AVCMUS 9 NEW VOM 17, H.

Incidentially, we have been able since the onset of my relationships with the lead problem in the tube manufacturing in this company, to reduce the average blood lead level of the employee from 67 micro grans percent, to 31 micro grams percent.

Those who contend that the effects of lead are important are most difficult to dissuade in the absence of the kind of information that you have supplied, and we are very glad to have the benefit of your reply* Several of us were recently at a meeting of the Dickey Committee that is investigating air pollution for the state of California, and many of the questions they asked us pertained to the effect of lead bromide and lead compounds in general on eye irritation.

Atwater's letter to you of August 20th, of which, as you know, he kindly sent me a copy* Since I last communicated with you and him on the subject of using Occupational Lead Exposure and Lead Poisoning* in the Monograph on Lead which we are preparing for the A.C.S., the scene has changed somewhat and I " now think that we will turn the lead hygiene job over to Schrenk and hfS as-j sociates at the Foundation.

I do not consider such an atmosphere a safe one and X feel that there is certainly a necessity for certain precautionary measures I have certain reservations about the adequacy of respirators If they are worn carefully and faith fully they are likely to be satisfactory* but it is sometimes difficult to have them used consistently and In the proper manner I enclose herewith a bill for the analysis* Very truly yours* RAKjls Robert A kefcioe* "1*'^* N9848 Filter from Respirator In Use one week by an employee of Fisher Body Norwood Division* Sample submitted by Dr* R* D* Mudd* The operation done by the employee consisted of discing down lead seams, the disc containing circulating water* Filter in use about 3 6 hra* Lead Iil.Q mgs* On the basis of a pulmonary ventilation of 20 cubic meters during this period of time the lead content of the atmosphere, if it all passed through the respirator, ws about 20 mg* ?