Document 3Q7BNV1LkjGXg6d1KgMx3bk6D

r& Irritation being rotated t:* tho pooullor filamaited atructuro of tho ribor and tha aosoolated flexibility, which aro possessed by go other forelpi body studied. Tima, ignition of. ohryootllo fibers ohanged Swtr atructuro and Bade than tnort although tho saao fibers, before being heated, produced flbroals (table 14). further support for tho theory of aochanlcel irritation Is that aaboetosls oeours la an organ of high mo bility - the lung - and that a fibrous reaction con be produced by In jection of asbostoa fiber* into tho peritoneum, where there Is also a degree of mobility,. but not In othor oxtrs-puloanary organa such as the liver, eploon and subcutoaeoua tissue. &w C0UPLIC1TI006 The experimental investigations with asbestos minoraIs were ooncorned primarily with tho effoct of the dust on normal tissue but se Jtt- attention waa_ given to othor phases, euoh as susoeptlblllty (to infection. Tho only experiment in which the offset of asbestos dust on a pulmonary lnfoctlon was studied was tho first inhalation exporinont, carried on with Xing1* floats dust. It la unfortunate that, owing to the lack of adequate facilities at that tine, infection studies oouldnot be made In tho. .ether., inhalation experiments also. Susceptibility to Tuberculous Infection. Tho development of a tuberoulaue process Initiated at the boginning of exposure to dust, and Also iu1 of a tuberculous infection superimposed upon tn established aibeetc'sls, was described In prooodlng section* of this paper. It say be stated that \ -41. r n> <3