I'KINCII'LKS (>]' CilKMlsTKY 

 ('alrhiui oxide- th;it i>. <|uieklinif is ;i substance (s}>. UT. .'> 



the p. .. :..>; '.1:1,-- i pi ;;,;,::'.:. 1 i -..,. i ,"!: \'. , 



. .1 mass under \vtitrr. 



In order tn obtain quite purr limr it. i- nere--ary to t;ikr thr pun's! possible nut 

 trri;il>. In tin- lal.oratory. niarl.lr r.v >hrll> aiv u-.-d h.r tin- purpose a> a purr funn nf 



calriuin ravl H rnatr. 'I'hr\' arc lir-t I'Un.'i iii a luriiarr, ninl thru put in a crucililr ami 



1 1 mi . ,.,1 tl i n in 1 1 i|iiantil\ ill \\alii-.and llini a;_ r ain tnni-jh i'_n ited, 1>\ \\liiri, 



mi i pun nliiained. I 'un re ra pidl\ pn-pa n .1 l.\ taking 



:e. ( 'aN.jt >,.. u In'i ' o!\ iii-j liuir .|,,nr iii nitric arid. 



'I'l il i i:y i.l linn- in nrili r to | reciji late tin- 



nliil.li A.ilrr. 'I In ,,\idr- of in.n. ill iniiiin. A r.. are 



(',,( :! ' , M ( i , 



I i ' ' . | 1 1 ' i \ < I (lit- linn] 



n i ln-hl<, 



