Incidentally, the dosage of "colloidal lead" used hopefully at one time in the treatment of cancer was not small, as your words suggest, but was dangerously large.

No. 371 for inforrmatioa on the concentration of lead in bone in plumbism.

Source API Spec RP-9B, March 1966, Use and Care of Wire Rope off to the circular contour which will provide the recommended groove depth So far as the life of wire rope is concerned, the condition and contour of sheave grooves are important Sheave grooves should be checked periodically and should not be allowed to wear to a smaller diameter than those shown for used grooves in Table 23-G If they become worn more than this, a re duction m rope life can be expected Recon ditioned sheave grooves should conform to the tolerance shown m Table 23-G for new (or remachined) grooves On all new sheaves, the grooves should be made for the size of rope specified The bottom of the groove should have a 150degree arc of support, and the sides of the groove should be tangent to the ends of the bottom arc The total depth of the groove should be 1% times the nominal diameter of the rope, and the radius ofthe arc should be one-half the nominal rope diameter plus the tolerance shown m Table 23-G for new (or remachined) grooves Multiple layer winding on drums should be avoided, if possible, because the rope will mash and jam and its life will be shortened materially, particularly at the point where the rope nses to the next layer Where practic able, the drum should be of such diameter and length as to take all the rope in a single layer Crushing and excessive wear of wire rope are minimized by use of helically grooved drums with capacity for one layer of rope In any case, the number of layers should be limited to three Rope lifters are recom mended when two or more layers are wound on drums To distribute wear at crossover points uniformly, IV* wraps can be cut off every six months or three or four times during the life of the rope In no case should there be fewer than three full wraps on a drum In general, bending of wire rope --first in one direction and then m the opposite--over sheaves or drums wears out rope faster than any other known cause and should be avoided It is desirable that the fleet angle not ex ceed 1 degree, 30 minutes, to reduce any tendency for the rope to open-wind Also, a minimum limit of 0 degree, 30 minutes, to assure the rope's starting back on the next layer, has been found desirable Adherence to these specifications will help ensure uni form winding on smooth-faced drums and will also increase the efficiency of grooved drums For smooth-faced drums, proper direction of lay of rope for specified winding conditions further helps ensure uniform winding The head sheave groove should be checked for poor alignment, worn bearings, broken flanges, and size and shape of the groove at intervals of two or three months, depending "The fleet angle is the included angle between the rope winding on the drum and a line perpen dicular to the drum shaft and running through the head or lead sheave 646

Specifically in birds, PCB can effect the calcium metabolism leading to egg shell imperfections which prevents proper hatch of the young.

The data for lead-tin solder are for short-duration loading.

This leads to a description of the various indices of heat stress and an evaluation of their usefulness in given circumstances.

The circumstances leading up to the source of members was put to the of the Health Department and whilst they accepted the explanations explanations they were adamant to planned and practical approach the problem must be <. high that @ takes ~ J.

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

Selikoff that cupations from engine fitter said that he and a team of d leads aerious lung disease only about 1 per cent of the to stoker had been accepted tors have yet to analyze the de- So far the three Federal men working in shipyards hanby hanby British health authorities shipyard workers for cause have made no pub dle asbestos directly but that as victims of asbestosis a death He also said that partments 2 * He acknowledgment of the re most shipyard work is con- chronic inflammation of the team will study another port or its contents fined to such small places like lungs that causes shortness of autopsies done in the Insti Insti Autopsies have been done on about 1000 persons who died in Mount Sinal Elmhurst in Hospital in Queens and Veter- ship's holds that just about all shipyard workers Inhale asbestos dust on the job The 70 shipyard workers breath and heart disease The men in ten of these 12 occupations work sma machinery spaces where years for evidence of asbes in the lungs But seems clear there problem here Dr.

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

Certain authors have claimed that the South African blue crocidolite fiber can lead to mesothelioma.

This leads to a coat savings of approxi mately $2/ton.

Antagonistic action or potentiation may occur with some combinations of atmos pheric contaminants Such cases at present must be determined individually Po tentiating or antagonistic agents are not necessarily harmful by themselves Po tentiating effects of exposure to such agents by routes other than that of inhalation is also possible, e g , imbibed alcohol and in haled narcotic /trichloroethylene) Po tentiation is characteristically exhibited at high concentiations, less probably at tow a ADDITIVE EFFECTS I C: j Cj j T, T, T, CN _ j Tn Air contains 5 ppm of carbon tetra chloride (TLV, 10), 20 ppm of ethyl ene dichloride (TLV, 50) and 10 ppm of ethylene dibronude, (TLV, 25) 5 20 10 65 10 + 50 + 25 _50-13 When a given operation or process char acteristically emits a number of harmful dusts, fumes, vapors or gases, it will fre quently be only feasible to attempt to evalu ate the hazard by measurement of a single substance In such cases, the threshold limit used for this substance should be reduced by a suitable factor, the magnitude of which will depend on the number, toxic ity and relative quantity of the other con taminants ordinanlv present Threshold limit is exceeded b INDEPENDENT EFFECTS Air contains 0 15 mg/tu m of lead .

Ve alao considered that they night be ooapounda of the paetioldea with aterol or protein aeterial or be polynere or inter-oondensatioB produots of the pesticides, /* dv> Experimental work failed to oonflrn any of theee hypothaeee end being short of staff we abandoned the work until we obtained a positive lead.

George Wright, a leading medical researcher in the field of asbestos related environmental health problems--who is the Director of Research at St.