HUNTLY-SULPHUR AS A CAUSE O F CORROSION I N STEEL, 339 initial vclocity of tliosc steam jcts ivns considcrnbly grcntcr than tho initial vclocity of tho gases ontcriiig tlic clinnibor. JIr. PORTER, in rcply, said I10 had found tho wntcr sprnys an cscellont thing in hot wcntlicr, but difficiilt in cold wcntlicr : tho cliambcrs got cold during tho night niid rcquired somc littlc nssistnncc in tho wny of stcnm. Tlicrc wns tlic difficulty of freezing niid tho filtering of tho wntcr ; if tlic jcts got blocked instcnd of getting n s p y thcy ~voi11d got drops of wrtcr, tliercby diluting tho bottom acid. hi rcply to Jlr. Carey, ccrtnin modificntions would liaro to bo nllowcd for in tlic cnsc of R working clinnibcr, but Iic did not think that tlic nllownncc wns quitc so grcnt 11s miglit nppcnr, becnusc tlint nctiinl modcl had been workcd with stcirni and at n tcniporntiirc in SOIIIC CRSCJ u p to 100'. IIc lind inudc ncid iii tho clinmbcr, so niiicli PO that tho bottom wns nctiinlly burnt. Still, tho niorcmcnts of tlic gnscs nppcnrcd to bo quito tho s n i i i ~. In y c t i c c , \vlicro tlic bottom inlct lind been ndoptctl, thcy ind proved tliirt tlio liottcst point was iii tho ccntrc of tho clianibcr, wlicro tho clinnibcr wns of rcnsoiirrblc lcngtli. Jlr. Holdeii lind iiot found i t nn ndvniitngc wlien tho fnn wns stoppctl, but in tlint case tho clinnil~crs wcro vcry long in proportion to tlicir liciglit nnd width. Tlicrc wns 0110 lnrgc firm tlint wislicd to ndopt tho hottoin iiilct. Tlicy hncl two So. 1 and oiic No. 2, and all tho otlicr clinnibo~ in tnndcni ; tlicy nlso hnd scvcrnl union clianibcrs, nicrc bozos, tlio snmc Iiciglit, about squnrc. Acting on his ndricc, tlicy cut out four of tlicsc unions and onc clinmbcr, niid divided tlic otliciv into two sets, rtnd inirtlc morc acid tlinii tlicy mndc before. With rcgnrd to JIr. Carey's qucstion with rcspcct to tho incrcnsc of 120 toiw n weck from 03 tons; tlic cnpaaity lind droppd from about 20 cubic ft. per Ib. of aiilpliur to 15, in otlicr CRSCS to 14, 11. 104, a+icIi wns tlic lo\vc~t 110 kncw ; of coursc, \vhoro this incrcnsed work lintl conic nbout, cstrn burncw Iiirct bccn providcd or s\vitcIicd on.
An ndvniitngc of kecpirin tlic cliambciu fully up to tlicir work was t~iot, w~icn worXing a c~innibcr 20 or 30 culJiu It., tlierc was iiot nlwnys sufficicnt condcnsntion in tho back of tlic clinmber to wct tlio ciitiro tiurfnco of tho cliambcr.