The va lu e s fo r p a r t i c u la t e le ad in atmosphere are u s u a ll y e xpre s s e d in terms o f 10 cubio m aters o f a i r , and on th is bas is i t la cu rre n tly aocepted th at values in excess o f 5 m ill Igr2a por 10 c u b le m ate rs nre u n s afe * Tome e o rke ra g i v e Un fitly lo s e r valu e s lo some ln s ts n e e s as lo s - n 1**> m illigra m s par 10 c u b ic me to rs * The e vid e n ce * however* lo ve ry good in in dicatin g th at busto exposures as loe as th at involved in b re th ln g a i r c o n ta in in g 2 a l-li g r a m a o f lo ad per 10 cu ble m e te rs * e re s ub* s t a n tla lly s a fe fo r a ll workers re gard le s s o f e u s e e p tlb lli ty fa c to rs * On t h i s b a s i s o f com parison the va lu e s o bs e rve d in the v i o i n i t y o f th e po t may be re garde d as i n d i c a t i v e o f s a f e t y * In th at th e b a s ic le a d oonoe^fcratlon has appeared to be in the neighborhood o f 1 m i l l i g r a s per 10 c u b i c m e te rs * w h ile th e b r i e f p e rio d ic expoeure* during dro s s ln g end s h o ve lin g i s o f the order o f 2 *5 to 3*0 m illigra m s pe r 10 cu b ic m e te rs * Jiy e x p e rle n e e in Industry loads no to b e lie ve th at th is degree o f exposure does not indues s u ffic ie n t lead absorption to cause lead poisoning* Th is con c l us i on i s f u l l y v e r i f i e d by the re s t^ lta o btain e d In the e xam in atio n o f 2 em ployees whose work has In vo lve d d a i l y exposure to such lead as la re gu la rly d is trib u te d in to the atao s * phere around the p o t* N e ith e r o f the two workmen showed any c l t n i o a l eviden ce of o ccu patio n al le ad abso rptio n * n e ith e r had a le ad H u e * d e s p ite the pre se n ce o f co n d itio n s In the nouth (pyo rrho ea) uhioh are fa vo ra b le to th e deve lo pm e nt o f le ad d o p o s lts in th e gum t i s e u e * N e ith e r o f theta showed any blood changes (anemia or s t i p p l i n g ) s u g g e s tive o f le a d a b s o rp tio n * N e ith e r o f them had abnormal q u a n ti ti e s o f lo a d i n t h e i r blo o d and u rin e * I e rrlt u ye r had 0 .0 U mg* per l i t e r o f u rin e * and 0 *0 3 ^b pe r 10 0 grama o f whole blo o d* w h *'e John Difcs le r had 0*03 Tb per l i t e r o f u rin e and 0*033 a s * i*b pe r erama o f whole blo o d* These are q u i te w ith in th e lim i ts o f va lu e s found in p e r fe c tly normal persons w ith no o cc u p atio n al expo sure to le a d compounds* I co n clu d e , th e r e fo r e , from the co m bin e tlon o f th e s e d ata, th at the o ccu patio n al co n ditio n s stu died a t th is time are n o t such as to e n t a i l th e r i s k o f le a d p o is o n in g In workmen I t l e als o n y o pinio n th at tha co n ditio n s de scribed as in axiate n o e a t th e time o f th e p l a i n t i f f *e employment, w h ile pro bably in vo lvin g somewhat gre a te r e xpo s ure then th a t which o ccurs a t p re a a n t, were n o t s u f f i c i e n t l y d i f f e r e n t In type or magnitude to J u s t i f y an opinion th a t le a d po is o n in g would have r e s u lte d from th e e xpo s u re Good c l i n i c a l e vid e n c e would be re q u ire d , th e r e fo r e , to co n vin ce me th a t th e p l a i n t i f f had le a d p o is o n in g a t th e t i r e i t waa claim ed th a t he had By good o l l n i o a l e vide n ce I mean th a t c h a r a c to r i s ti e symptoms, a s s o c ia te d w ith le ad l i n e o f the gums, pe rh aps , and c e r t a i n l y w ith e xo e a alve numbers o f "s t i p p l e d 0 red blo o d c o r p u s c le s , s h o u ld have been pre s e n t The pre s e n ce o f ab normal q u a n titie s o f le n d in th e u rin e or blo o d or in bo th a t th a t t i 'O , would have been co n vin cin g, w h ile the lack o f such e vlde n oe Is a serious fa u lt in the p la in tiff*# o lain Returning to the s u b je c t o f "s t i p p le d " e r yth r o c yte s ( re d bloo d c o rp u s c le s } I t la n e ce s s ary to dem o n s trate th e pre s e n ce o f abnormal numbers b e fo re s i g n i fi c a n e # can be a ttu o bed to th e phenomenon "s t i p p l e d " e ryth ro c yte s o ccur in th e blo o d o f normal perso ns up t o ton o r more por f i f t y m icro s co p ic f i e l d s , and th e y arc found In in cre a s e d numbera In a wide v a r i e ty o f co n d itio n s which have nothing w hatever to do with le a d abao rptten Th e ir pre s e n ce , w ith o u t re fe re n ce to numbera, or without knowledge o f o th e r conoom ltant ohanges in th e blo o d, la wholly without diarnoofclo s ign ifica n ce Signed Ro be rt A.

N25360 0007-SWP-000122137 0007-SWP-000122138 0007-SWP-000122139 0007-SWP-000122140 % '/* / Lj , f'1 JJfUoul^t-*U*-t-. f9s te.p/.3vy9- f 7 +O7.s^at'&f ># par/7 3s-sOe.S+pS*0?

The Glidden Co., to choose at random from its hundreds of products, makes paints, poisons, salad dressing, cattle cakes, type metal, oleomargarine, and aex hormones.

The Glidden Co., to choose at random from its hundreds of products, makes paints, poisons, salad dressing, cattle cakes, type metal, oleomargarine, and aex hormones.

In fact several of those it for them without charge--pure white who had persevered to the end still car- ifc fcV -i,s -yi r'W, |l --i ||L|| . 0007-SWP-043036 January Black Diamond Express 27 lied lame wrists, which the doctor's wife, who naturally knew more about such things than the rest, diagnosed as " wrist drop " from lead poisoning.

, \ Lead Industries Association, Inc.

Only enough sulfur is left in the ore to combine with the lead in dieformation of lead sulphate.

For, while we lead the world in steel tonnage, we are also a world leader in literacy.

The Chameleon. ?

Th is r e su lt e d fr o m th e lead - co n tain in g b r a ss hub in th e o r d in ar y n eed le.

By contrast, the catalytic system % i can be degraded by heat attrition, poisoning, you name It, and thereby be rendered Ineffective, and a motorist has no way at all of knowing this. 9 Well, perhaps ve can start Into ths slides.

By contrast, the catalytic system % i can be degraded by heat attrition, poisoning, you name It, and thereby be rendered Ineffective, and a motorist has no way at all of knowing this. 9 Well, perhaps ve can start Into ths slides.

`l 3rO-3t 0 O E& K3 So gi fi Bi 4c,>- fHt f0,,i og * g* b 0B fo, |- u 43 *8 8| *% e 1I 1*4 4&g3 0iSs a1> J0S S*i Hi ,pc, a ft* 3 4CO33 533 \ \ *k* mu mmemployed In blovin g operations unions due precautions taken# S danger o f heavy n o ta i poisoning sould be sconti a t those d u st conoontratt ana* I f there ero s ig n ific a n t q u a n t!

A CONFIDENTIAL REPO':-T ON CAGES CF TETRAETHYL LEAD INTOXICATION ARISING CUT OF THE CLEARING OF AVIATE K GASOLINE STORAGE TAMS AT KALE, DORSET, J.NUAEY - MARCH, 1951.

m ted lead H00V.