Bland was suffering from lead poisoning.

b per 10 cu*m* of air* Fo r safety there should be not more than 5 mg* per 10 cu.m* The atmosphere of the plant in the immediate vicinity of this operation is therefore definitely hazardous and would be expected to produce lead poisoning unless adequate protection were provided* Reported!

The AAP points out that tha continual uao of paints with higher than 6.06 par cent will Incraaaa the rirk of lead poisoning to children.

Kehoe, I am sending you reprints of articles concerning lead poisoning which I have done, together with articles I have written in conjunction with Dr.

I cortainly share your doubts as to whether the raan's injury was lead poisoning.

Joseph Lead Co.

Various expressions have been given to this relationship, and it cannot be said that there is complete agreement among authorities as to the safe limits of occupational lead absorption, nevertheless It is now fairly generally accepted that there is a limit of lead exposure above which the.danger of lead poisoning becomes progressively greater among a plant population, and below which cases of poisoning will either not occur at all or will be of an essentially harmless type.

However, diagnosis of lead poisoning was made and patient was transferred to non lead area after having been out of the plant some four weeks.

The results in this case in both tho urine and faeces fall within the limits of the lead excretion of supossedly normal individuals* They cannot be said therefore to be .significant* This simply leaves us so far as the diagnosis of load poisoning is concerned in exactly the same position as we were before, namely that of complete dependence upon clinical observations* The results are a s .follows rine - 3720 cc* -- 0.41 mgs lead aeees -dry weight- 18,15 i&rams -- 0,25 rags.lead The latter figure calculated in terms of milligrams of lead per gram of ash is equivalent to 0*09 mgs.

I have spent the greater part of my professional and: scientific life in - the Investigation of lead poisoning, and perhaps more, specifically, in the study of .the physio logical arid pathological behavior' cf lead in the -.animal organism including man, with some special attention to some of the organic compounds of load, principally tetx'aethyl lead.

The concentrations of organic lead mere low in both instances and it is worth noting that the absolute amounts of organic lead in the scale were less than 0.2 mg. in the entire ICO sc. feet of surface and about 1.3 mg. from the entire IOC sa. feet of bottom plate.

For your information I should like to point out that there has never been a case of lead poisoning in this occupation# and that the persons engaged in it do not show any even slight increase in their level of lead excretion as evidence of lead absorption.

P* Hugo General Superintendent Associated Oil Company Avon, California Dear Mr* Hugo:- Your letter of September 5feh concerning an employee of yours who has been diagnosed as having progressive muscular atrophy, has been referred to me from the Hew York office of the Ethyl Gasoline Corpora tion* As a result of years of experience with the conditions in testing laboratories, it seems almost certain that there is little or no opportunity for significant lead exposure in work of this type* Therefore, unless the occupation of your employee differs materially from that of a large number of other men who have been engaged in this work, there is no basis in his occupational exposure for considering seriously lead as a cause of his present Illness* Progressive muscular atrophy is a clinical condition which has been known for some time and there is no good reason for assuming the presence of such a factor as lead in the origin of the condition* It must be admitted that we do not know very much about the precise background of ita occurrence* It Is also true that lead poisoning is likely to result In muscular damage and in atrophy of certain groups of muscles* In the case of lead, the picture is usually quite characteris tic and it should be possible to make a differential diagnosis* We shall be very glad to do what; we can to establish a diagnosis In the case of this man* One of my associates will be in California in the course of a regular trip for the purpose of examining the personnel at the mixing plants* I shall turn your letter over to him and he will be glad to make an examination and obtain as much clinical information as is possible* In the mean time we should be glad to make analyses on the blood and excreta of your employee in order to see whether he shows any evidence at present of lead absorption* It may or may not be wise to do this at present slnoe it may be that his exposure was discontinued some months ago, in which Mr* Y?

This is in addition to the routine physical examinations for indications of lead poisoning.

In my opinion there is no advantage, and there are definite disadvantages in the use of lead-containing gasolines for a variety of purposes, but so far as I can see, there Is no danger of lead poisoning involved in the U3e of such gasolines in stoves, lamps, blow torches etc.