nation of these m@a is on adequate means of main taining hygienic* control* On the other hand from tine to tine over a period of years, wo have selected a group of these non and have studied their urinary and fecal lead excretion with the idea, of determining whether they trera absorbing abnormal amounts of lead* 2'believe X have sent you reports of the" results of the??

Paul, we used to have an average of thirteen or fourteen cases of lead intoxication a month.

Biol, of MftoOregor Lead Cnfsay.

This wiil enable us to see whether at the time of your examination there is any evidence of abnormal lead absorption.

NATIONAL LEAD COMPANY H.

So far as the other lead alkyls are concerned, the only one I know that has been investigated extensively is lead tetramethyl.

CHEM TEST ARTICLE CAS# N/A SOIL W/ LEAD LOT# N/A CODE# AEC-3-3 N.B.

(l) assuming such circulation and a true concentration of lead in air as the asymptotic value for each setting indicated an effective circulation corresponding to complete lead recovery from approximately 7 liters of air per minute.

;'ehoe baa probably advised you, these should comprise a cor plate history and physical examination, certain hematologic studies and sufficient data on the blood-lead levels and urinary lead excretion on these c.en to establish their actual magnitude of exposure while at 'fork* Very truly yours, *vt--: vr cc - & C.

Hood (2 ) - January 31, 1957 manufacture of tetraethyl lead.

ANACONDA LEAD PRODUCTS COM?

(l) assuming such circulation and a true concentration of lead in air as the asymptotic value for each setting indicated an effective circulation corresponding to complete lead recovery from approximately 7 liters of air per minute.

With regard to the question of analysing for iouic lead, I did not mean in my letter to imply that we had an accurate quantitative method for analysing ionic lead* What I meant to suggest was that the rapid screening method, srAcc using iodine, virtually brought down only ionic lead, and did not pick up lead in a more tightly bound state* Obviously, this is not a strictly accurate situation chemically, but for practical purposes we have assumed that therein lies the difference between the short and long methods of lead analysis* I am not sure at the time of writing whether in fact lead soap would fail:to come down in the, short method, but it might be worth testing that out. \' 1 With many thanks indeed for the interest and trouble you have taken. !

Kr 0016700 M> t-'i Oi M he amount or white lead used by the claimant was very minute and cund it almost impossible for the. claimant to get lead, on his han Very truly yours, (Signed) HARRY L.

I have no hesitation in telling you that in my opinion, the conditions with respect to lead exposure are quite hazardous.