2N sulplhiric 'nciil is ritldcd drop by drop. TIic liqiiid is thcn dilutcd with writcr to 30 C.C. and 10 drops of strong nitric iicid nntl ?, drops of silvcr riitmtc solution arc nddcd. A prccipitntc iiidicntcs prcscucc of clilorirlc. A spccific rcnction of ioilidcs is givcn by Kruishccr.lZ The solution is iiiisctl with iin cquril volnmc of strong liytlroclilorio ncitl, nnd tlicn snt,urntcd wit,Ii sulphur tliositlc. If :L ycllow colour nppcnrs, which miiy bc cstrnctctl witdl niiiyl nlcoliol, ioditlc is prcscnt. h spccinl rcngcnt is rccoinnicrlltlcd I)y JIontcqui nncl Otcro23 for tlic tlctcctioii of chloridc in t.lic prcscncc of cyiinido. Tlic rciigcnt! is prcparcd by dissolving 4-25 g. silvcr iiit,r:itc iiritl iiicrcuric nitratc (made I)y dissolving 2.7 g. iiicrcuric osidc in 10 C.C. strong nitric iicicl) in wiitcr, :inti diluting to 50 C.C. On ntlding tliis solution to i i tlilutc soliition cont:iining chloridc illid cyrinitlc ions, non-ionized incrciiric cyniiitlc is formctl, togrtlicr wit.li silver clilorirlc. Tlic solution slioulcl not, rontriin more tlinri 0.5% nlk:ili cyiinidc or mi insolnble complcs mriy 1)c foriiicd. Spiicc docs not pcrniit of :I tlcscription bcing given of iicw iiict,liods of (Ictcriiiining tlic liiilogcn osy-iicitls, or of tlic usc of ntlsorption intlicntors in tlic dctcriiiiriiitioii of Iiiilidcs iiritl of silvcr, irpon wliicli :I good tlciil of work hits beell done. I~I.:~l~L~ESCISS T I i t * rcfcrcticca A. r i t ~t l 13. iirc to llritislt CItcttiicitI Al,striicts.