Other uses which have been described are in the refining of aluminum, the production of tetraethyl lead and the synthesis of primary alcohols.

The whole subject has been sensationalised because some recent medical research is of a kind which readily attracts headlines, and because asbestos dust can, in a minority of cases, lead indirectly to cancer, which is always a "scare" word.

Foulkes of the University of Cincinnati notified me of your research project: "Human Exposure of Particulate Lead Compounds in the Air under Experimental Conditions."

The newly designed program leading to the M.S. and Ph.D. in Sanitary Engineering for Radiologies Health Specialists includes courses in radiochemistry, radiobiology, nuclear physics, radio active waste disposal, nuclear engineering, reactor physics, nuclear reactor engineering, public health, statistics, and air pollution as well as a variety of interdisciplinary options.

Martino, presi dent of National Lead.

$ 3,042.00: Contribution; Membership Subscription to Lead Industries Association, from April 1 to , . : June 30, 1962. 12 000 00 Advertising Department; Printing of 12,000 copies of Doehler-Jarvis Division booklet entitled "Engineering and Purchasing Guide to Die Casting".

Raising of tha Inject Port temperature did not lead to any different results.

TELEPHONE: WALNUT 2-5000 The Mall Building July 17th 1962 General Electric Company Salem, Virginia ATT*i J. 0* Copland KE: JOHNS MfiHVlEEE STILE 1202 BRAKE BLOCKS BONDED TO STEEL BACKXSO PLATES Gentlemens- You -will -undoubtedly recall giving car Mr* 0, T Ghalloner during the latter part of June a bonded assembly taken from a get of blocks returned to you by one of your customers* The blocks in this set indicated that they -were starting to debond* The saaple assembly you gave to Mr* Ghalloner was forwarded to our Waukegan Factory for their observation and comments and the following is quoted from their report, "The sample block has been examined and it appears that high temperatures plus shock leads has caused a partial debonding* As to the maximum temperature the bond will withstand, it varies with the length of time at which it is subjected to that temperature* For example, to debond the brake blocks, 600F for 30 minutes is enough to destroy the cement* At *>.006F, it takes about 2 hours and at li*foF about 2h hours* At the lower temperature, -Die cement- is not actually destroyed, but it becomes brittle so that a sharp blow cad shatter it -and separata the brake bluuk frum1 the MBtftl J The temperature we are talking about Is the temperature at the bond, not the temperature at the surface of the block* To get such high temperatures at the bond in service would require extended or prolonged friction heat -that could be severe enough to destroy the binder in the brake block itself, especially -When one considers the mass of metal available in the brake assenfoly to absorb and dissipate the heat* The surface of the senile block is badly heat checked and does show evidence that it had been at a high temperature for a considerable time* Ws vo&ld assume that at that time the brake gave off considerable smoke which should hare been quite evident to the operator* lb. answer to your question as to what is the maximum safe operating temperature and still maintain a satisfactory bond

'It is obvious that the elimination of Wellman as a substantial competitor from the already limited number of producers necessarily leads to the results proscribed by the statute.

Tor the small "rcNSiLE-KuT*' HILLINO MACHINE THC EXISTING VACUUM CLCANCN CAN BE USED, BUT THE EXHAUST TROM THIS MACHINE MUST BE CONNECTED TO DUCTVORR LEADING TO TNE OUTSIDE Or THE BUUDINO.

They are excellent solvents and will dissolve the normal oils and fats of the skin possibly leading to drying and chapping if exposure is prolonged or repeated.

Ths equipment is so sensitive that the fraction of a cycr delay normally required to switch to battery power In case of emergency outage, cannot bo tolerated -- so a static inverter continuously converts the direct current of a 60 cell lead-acid battery to alternating current.

Japan has recently followed the US. lead and has banned DDT and HCB.

Examination of the meteorological tools available for air pollution studies leads to the conclusion that important advances have been made in the utilization of meteorological knowledge in this field.

Although It impairs ability '< read and to recognise faces, it does not lead to blindness.