1825.3 Sir H. Davy on the Safety Lamp. 469 



The body of the labap should be of copper riveted togetb^r,,,pR 

 ■|»f mft^sy 9^^'Vfs>^s,( Of eastii^dAjl Sh^ 6,Qrevysshov44 fit, tight j 

 nQiapertijre* Ao?y,6ij^f:5r««//,,siw>iiJ4 be §.uffp;-iQ4 to jexist |n , th^r 

 b*94y!joC :thp :lar^p, .^nj^; the itrimffiUig,; v*fire,§ho\ild rqQve: ttiTo^h^ 

 i<Ji9?*g tAghtitpbfi. .The jtiempera4iur^,<!)£ i»etal, ev;en wh^n, \y±ujti9j 

 hptyis^Var,b?l9.Wvt%t.:0f,fl(aBiiei; '.mi^uh^<^ r^drlijot ,ga,u2;j^,jin, 

 Sji^fficiiiAt-qwautityii^n^ of, the prope? 4f>gFe,e of 4ft€j),es^j,wiU ^b^ 

 f^?^Jf iSiH^05^nt feieSt .froi», ' tJiei flaia^j ^f .Jfes,' ! irje-4itfQJ>>;;ltp vj^J(<f 

 fcmgui|h.-'it,''-i,o-!.i ri;!j':ilJ i>'''i :;'.;■.; iiVA'.j ■ J ::>5-i^-.n /iii'.v ..vi^ivcri 

 bnF'e;;h4Y^ ^W§lt>Sft iG9|)¥W^ly,'0»o£hgjiri||ji,s4c|ion, ^\^]^\^,inri 

 ter^stingilbo9fcii frppk^ite great .^Fa0tic4xWpojptajipej..4i^l^t,m 

 ^aa- spare .V;$% littW sp^ce for \h^ (Oitherp,- whi<?h. o^^cupy tgf far 

 ^.l^^getf! f^iftR Qfi .ths'FpkTOfc, ,an4 icwsi^fi fif .^xtrac^l^'fl^Pl 

 |ftp^r^ippbU^0d \'b!y[!the I ai^hor.Ui Htb©'PM<?^!>}>feiQ£ili!r|'a§sap?5 

 lipps. .?^iiiQ(;:;tiiei, JijiuCnftl pf . gQifipqe^ oii>,^ thoi Eive; jlMffrP," ;th(5( 

 §9)?3ty J^a^SP^Cj^li^ Qn.EfellBP ;; a, description <f>Ctt^?!:Pl*tff^tt;W5 

 beginning of thiSvWOjrk-rriajlti, e^!^,,i^xir?ic;^? /Cfjniif^viCfRmnjyW^^ 

 iJ^tip;i)iS,J piQif; th/^r.4pphQaAiQh.'/ ^f; ,#ienSa.f'$ty;' j^mprl/BOptt.: ■^'^• 

 guddl^iiPi'd ■.p.the?. gentleman /,I>ra,ctipal'iy^<J9»>ne^ted yvit^^^thA, 

 opfllj xtm^^y : >ali •; giv^og ; ith^: JxtwK satisfaptiO^ /t^sijfl^ofty, r^.- .^Hft 

 fneftit^ ^nd^^ffipMy fll't^SJinportant dis^py0ry« j ^/n-H^nvi'lvnhi 

 Yj\y;e^halJLi!qu9!(€^i,p,ne more; impprtanl; -praaetical rpina^'k , /r^o^ 

 tb|^;!c(j?lc/M«c»»'- .; Thfe>iinPre?bs?d ,bfiat prpjdjAped . .Vy, an ieKplo-siy^ 

 injijqture'mif^ipid motioIii^3!eqi^i^e&/t;h:ai,tfe'?i r^^^ 

 sufi^qe, <?f ; th& lAti>|) fhpyld ^ i be inpreja^ed^, .pr j th^r eiiicpla^pj) p| 

 ^jt'<|^>1?M>AsJ)^-j . Fpt this purpose '^.twi^te^gaazg, pr,st[ c^ftubl^ 

 or triple fold of wire gauze on one side of the lamp, or a^ree^f 

 'pf meMlj,<?t>g^ite- itP tli©:dii?ectip.u jof; itfhetjG^irBentx'.tH-.^/.femi- 

 fijfi.JEider ^figl^Ss^ ,30,r,;r»ic^.w;ithift,,iaii^wers , pepf^tly J^i^.fi^jec^ 

 fif.meiv^tiiij^^ih^, hg^t J^opj, jri$i«g to- * §dneg?w" r-yfijfrbnjs b.nj 

 A short Appendix is add^ iiitthepre§$»tipiiibli9,at;)<?n, pontaior 

 ii)g.fiv(§;ijrticWv:j:;:Ths'ftj^!§t,^tfttegrthat.4^hieiMitJ^ 

 p^p^r- frppa-Mj. .Q.iyrtus^?c,^ wtJfct^B .^qw^ y^ar^ ago by M. de 

 ]cIumbol4t .and himself,, the rpsaltspf whiphare cpnfiFma,tQry pf 

 '^in Ey-fLiphry PaYy'^,pri:^ciples pnthflAau&e*- of cpnibustion^i]4 

 fgtpiptsjoB^ji jand,;?howAthat piixture^iPf 'p:X,ygein :aijd by^rpS^ii ^^ 

 proportipn^nptiriflaipmabie by the ■electrip spaxk, naay still be 

 made to combing.. ^Qjg(.'fpri:© iWi^ter.by. ^?!tif¥iia%/faisiAg, tj?eir 



temperatqre.iijiv/ gonabnotiasiioo oa/oa bed emd ! .^ •o''*^ " 

 ^ ,The jseppnd article rplates ftpfthp aphlogistic lamp, and tbe 

 repei>t,exp.erimen,ts .pf Dut>ereiner and iOthev^ oi^ the eUect of 

 spongy platina to promote thci uniprt of .pxyg«Qi:and jiy<^rogei) 

 gasie&> yespeoting, wWcblcSir ittumphfy D4vyt<)iFe;i^ ^hft. Mowing 



iu".A:^ro/^We;explan9.tioo PXthe.pbceapmenp^tmayrt t:ki?»]^> v? 



jfey^fid. Pi^eOitW'eilectrpqUf n>ical IjypQthcAJ^ 



the Royal Society in 18UG, and which has been since adopted 



