Supply Mains: The pipes through v/hich the heating medium flows from the boiler or source of supply to the run-outs and.risers leading to the heating units.

Very often, where such precaution is not taken, new troubles are created that are more aggra vating than the original difficulty.17 Silicate of soda is used to protect iron, lead, and brass water pipe.18 For most waters, a solution of Naj0:3Si02 is recommended.

"Whether changing characteristics of the United States population such as In diet, occupation, and residence, are leading to increasing or decreasing rates of cancer can be evaluated only through epidemiologic studies that collect information on individuals."

The reference literature contains Tower Performance Factors which have been reported by various investigators, but the reader should be warned that the use of such factors, without a full understanding of the source, may lead to erroneous results.

'Baaische has. been able to reproduce in the laboratory the conditions which lead to the incident such as theirs and ours at Nitro and was quite surprised that we had Dot been able to do so.

.* .t v B ear Mr* M unirs* , Your l e t t e r o f Kay $ th addressed to ttie B th y ^ C a so ^ n u C orporation concerning the case of Is alleg ed to he s u ffe rin g fro b o i^ ^ a u s e ^ o y ^ e x p o s u re to Tydol Ethyl G a s o lin e , h as been r e f e r r e d to me f o r re p ly # Over a p e r io d o f y e a rs my asso cia tes and I have In v e stig a te d cases of alleg ed injury'am ong persons engaged In h an d lin g lead ed g aso lin e and d u rin g t h a t tim e we have b een u n a b le to f i n d a s i n g l e In s ta n c e of I lln e s s o r o f damage to the s k in a t tr i b u ta b l e to th e le a d c o n te n t o f th e g a s o lin e * As a m a tte r o f f a c t we f in d no re a so n f o r b e l ie v i n g t h a t le a d e d g a s o lin e d i f f e r s m a te ria lly in i t s e f f e c ts from the g a so lin e base to, which th e F lu id h as b een added* You a r e d o u b tle s s f u l l y aware of the fa c t that: co n tact w ith g aso lin e under su ita b le c irc u m sta n c e s may r e s u l t in b u rn s and may a ls o r e s u l t In derm atitis* O ccasionally th is d erm atitis Is of d istre ss* lng p r o p o rtio n s , so much so th a t s u s c e p tib le persons may have to d is c o n tin u e t h e i r ex p o su re to g a s o lin e f o r some fcir.e, or perhaps even In d e fin i t e l y In o rd er to he cured o f t h e i r s k in in ju ry * We have s tu d ie d c a r e f u l l y a fe u su c h cases and have found th a t they are s e n s itiv e to various m a t e r i a l s in th e g a s o lin e * .

198 CHAPTER 9 1954 Guide flow leads to surface conductances averaging about 1.50 for block and vertical glass, and about 1.80 for horizontal glass, as compared to the value of 1.65 used in computing U values given in other tables in this chapter.

Some observations concerning the behavior of glass with respect to radiant energy will lead to a better understanding of the heat-balance relation.

Lead..................................................................................................... .

This leads to a further sound attenuation.

Louis Smelting & Refining Div Local Goodwill Advertising 1957 $ 250 1956 $ 250 Texas Mining & Smelting Division Local Goodwill Advertising 1957 $ 300 1956 $ 430 American Bearing Master 'Metals Evans Lead Division These units report they expect to do no advertising in 1957.

1 Lead power factor It Improved 1 Correnf, carried bp supply circuit* ond lho equipment, le redeced.

'- Irving Selikoff, the na v i r o n in e.r. t a 1 medicine at' tion's ; leading- `expert on as: ;Mount..Sinai. .SchooUof.Medir-.-, : bestes pollution:.: |, cine,iri- NevvYdrlhCity;, and.di-;

A detailed study of the processes employed in the plant, conducted by Hall engineers in close co-oper ation with plant personnel, re sulted in-recommendations leading to a drastic reduction in the amount of waste requiring treat ment.

The increased body temperature leads to in creased cell metabolism, and in turn to still greater heat production.