COl.LECTloNS L\ KCONOMIC GKOLOOY ANI» MK'IALLI •K(;Y. 20? 



piT cent., riKi^in'Mia i;;.r> per friit., aii<i water I.'! per eciit. Tlic lihiouH 

 vaiit'ty is calleil clnysolile. 



The name Jishestos comes Crom the (Ireek lor im-omhiistihle, since itM 

 resistance to lieat is a marked characteristic of the material. It was also 

 c.illed ainiantliiis, meaninj; undedled, by th»' ancients, for the reason 

 that cloth made from it could he cleaned by puttin;;- it into a mo<lerate 

 tire. The value of asbestos for pnictical uses depends upo?i its liber, 

 its infusibility, and its noncondn(;tinj; power. 



The hij,diest <,'rade h(»rid)len«le asbestos comes from about SO nnles 

 north of Milan in Italy. It occurs here in beds and pockets of light- 

 gray and brown bniulles of parallel fibers, tirndy bound together, but 

 single strands may be separated many yards in length, while it is very 

 soft and greasy to the touch. This long, soft, silky liber and its chem- 

 ical purify give the Italian tiber its superiority. 



Large amounts of chrysotile asbestos are mined in Canada in and about 

 Thetford, Province of Quebec. It occurs as fibrous streaks or layers 

 in compact serpentine. It seldom yields libers over 7 inches long, but 

 the shorter fibers are much more silky and therefore of better quality. 

 For the manufacture of cloth this chrysotile asbestos is superior from 

 the fact that the separated tibers clinu toLicther and foini a mass like 

 wool. 



These two localitM's j)ro(luce nearly all Mie tirst-class asbestos. The 

 poorer grades of asbestos are (piite abundant in many localities. 

 They are poorer because the fiber is either short or hard or the material 

 is impure, a very common impurity being oxides of iron, which give the 

 material an undesirable color. 



Asbestos, both hornbleude and chrysotile, from a large number of 

 localities is shown by a collection presented by the II. ^^^ .Johns Com- 

 pany i of New York. 



ChrifHolili. 



( 1 > \'<-lirii>iii I .".u-Hn. I 



I ('2i Ni'w i l,'iiii|isliiri 

 TJitriiJiIfiiilc. 



.'.u'JU. ) 



(I) MasHuchiisrrts. (.'>090«i. ) 

 ('Jt M.iHs;u-Iin.Hctt8. (.")0'.I10. ) 



(3) Coneu-c-ticiit. (.'iO'.»l-i.) 



(4) Now York. (.'»0.">r>7.) 

 ( ■) ^ Ne w Yo rk . ( .'>0H68. ) 

 (<■•) New York. (.^OHeg.) 

 (7) New York. (508T0.) 

 (H) New York. (.■)0«71.) 

 (;•) PeniiHyhaiiia. (.'(O-flfi.) 



I 10) r«'iiii.sylvaMia. i .".OSiM;. ) 



(11) IViiiiNylvaiiia. (fjIWiC) 



(12) Marvlaiiil. ('yOfiin.) 

 (i:i) .Maryland. (r>0H'.>2.) 

 (IJ) Virjiiiiia. ('.OSTii.) 



(l.'») North Carolina. (.')087t;.) 

 ( H>) South Carolina. (.'.0.H74.) 

 (17) South Carolina. (r>U875.) 



1-) Georgia. (r)tl873.) 

 ay) Alabama. (.".OlHKl.) 



(20) TennessTf. (.'>0'.»0r).) 



(21) Iowa. (.■.09ir>.) 



(22) Wi.scon8in. (,'.0906.) 

 (2:}) Utah. (5t>5»07.) 



(24) I' tab. (r.OUOS.) 



(25) Dakota. (.'lODlti.) 

 2«;) Dakota. (.'>0<)17.) 

 (27) Nevada. (r>OdS'>.) 

 (2H) Colorado. (.'JOrtTH.) 



(29) Coiora.h). (r.0H79.) 



(30) Colorado. (.50880.) 



(31) California. (5081W.) 



(32) Canada. (SO,"*'..) 

 ;"") Canadii. (:»0rtH7.) 



lada. (.'iUtOO.) 



