Document 0LKEyKbVd4e9Lg4gN7LM07gNx

FILE NAME: Metropolitan Life (ML) DATE: 1950 Dec 19 DOC#: ML159 DOCUMENT DESCRIPTION: Memo to Dr. Abrams RE Increasing Reports of Dust Related Pneumoconiosis, X-Rays Show Atypical Results - Dr. Lanza Disputes Dangers - Other Docs Disagree with Dr. Lanza MEMORANDUM STATE OF CAUTOKNLA ^ department of pubuc EcE iv s a health-^ ^ 1U HE 4All/ y Dr. Herbert I . Abram* through Mr. Fred E. Ingram From: H r. F a s il E . C a n la n Due: December 19, 1950 Subject: Monthly meeting of the Santa Barbara County Hospital Medical Staff On December lb, 1950. Dr, Invited me to the dinner meeting meeting v?.g Dr. Welter Anderson, earth. After his talk he showed Johno-Manvi H e . Nardo, nev Health Officer of Santa Barbara County, of the above organization. Main weaker of the who poke on Pneumoconiosis produced by dlatoosceona chest x-ray alides of many of the employees of Important point that he brought up were (l) 108 dlssbllny ranee of pneumo coniosis hare been recorded at Loarooe within the past 20 year, with IB death. Many cae o f progressive conglomerate lelon have been oberred with exposures of 1 to 2 year to the dust. One case was observed after a ? month tic o iu re , (2 ) The conglomerate lesion which are disabling ars caused by the processed powder, which change the amorphous l i l i c a to critobalite (60^) and trldymite (25t). The r e la tiv e t o x i c i t y of thee two crystal compared to quart i : quartz 5, trldymite 8, and critobalite 9 . (3) IntiS^venon .lnnoculatlon of animal* by Gardner with the untreated dlatomaceous earth caused fib ro sis and death to the animal*. (b) The typ ica l x-ray picture* of thi* pneumoconotis are very different from t y p ic a l s i l i c o s i s pictures. There 1* not the typical nodulation bat sometimes a pseudonoduletion i s observed. Instead o f the arte rial systems being involved, as in the ease o f s i l i c o s i s , pneumoconiosis da* to distomsceoas earth involves the venous vascular system* (5) Lanxa says that ths incidence of T.B. at Lompoc 1* no higher than at Santa Marla (supposedly a comparable community) but Anderson think* that the residents at Lompoc j l more susceptible. I was unable to talk with Dr. Anderson after the meeting, but on the previous day, I had made arrangements with Mr. Legge and Mr. Wilson, of Johns-Manvills to do a sizeable engineering study there this Jebruary. ani I . Caplan MKT-0000350 TRIAL EXHIBIT