when the lead in the tissues, blood and urine is derived in some part from the chemical degradation of tetrae tj:hyllead (or other lead alkyl), some or much of it may be in he form of tri-ethyl lead salts.

Lead poisoning presented itself to Dr.

TrUM* (Tribasic lead maleate.)

Lead stabilizer customers are moving in the direction of a shipping.and unloading system to minimize or eliminate air borne lead dust generation x and disposal of lead contaminated bags and the air pallet, currently being offered by Hammond Lead and Associated Lead is being touted as the desirable system.

Blood lead concentrations and, in 3 cases, urinary lead excretions were deter- 1Kety, S.

Kehoexx LEAD I.

PIG LEAD SALES IN THE U.S.: (include sales of foreign as veil as domestic pig lead.)

Another possible mechanism, not addressed by this work, is whether increased blood lead level leads to renal damage and hence to hypertension or whether increased blood lead level leads to hypertension which then leads to renal damage.

Cue might make the guess that the inorganic lead found in the inner portion of the hose is the combined result of some initial quantity of lead which entered into the original compo sition of the hose, plus some quantity of the decomposition products of tetraethyl lead which penetrated through the rubber wall of the hose, plus some considerably greater source of lead deposits on the internal surface of the hose.

As a consequence of this feeling, I have said very little in published articles about the mechanisms of lead absorption and lead excretion.

TrUM* (Tribasic lead maleate.)

The amount of lead present, therefore, in a given area of film is extremely small.

He entered the hospital with symptoms typical of lead colic, and it was some time before lead was suspected.

We are attempting to establish the upper level of the concentration of lead in the air, which when breathed by normal, healthy human subjects (who are ingesting lead with their food and beverages at the prevalent level of normal adult citizens in the U.S.a .) fails to induce an increase in the rate of their urinary excretion of lead, or in the concentration of lead in their blood.

The pattern of response in the work done so far would aopesr in the case of tetramethyl lead to follow that of tetraethyl lead where it has been shown, in a paper published by Miss J.