f rir and vnpour. At this tcnipernture there is n flnsb of mne going ininiediiitcly oiit. A ~oincwlint higher teinrintiire is rcquiretl to cvnloc rnpour siificiciitIy fitst to ccp up II cnnstniit tlantc. 't'he lorest temperntiire for tliis a sonictiinca cull~d tlic firing-point. The old nicthod of akiiig the flnsh-point, fiscd hy Act of I'nrlilment, wnp by :ntdunllg Jieriting the oil iri nn open clip, pctly scrccriccl tom ilraiights, wid tipplying ii light iit iiitcr.ids. 1)nriiig lie cs~rcrimciit, tlic vnjioiirs first given off tliffiisctl nwny nto the atmnslilierc, wid :I point far nbnvc the true !Insliioiiit wns got, and this, of CniIISC, ~i i v e II hlsc iiiiprc?;sioii 11s o tlie d c t y of tlic nil. 'l'his nietliod w i s not rcjcctcd on his iicroiiiit Iio\rcvcr, lint ~~cciiiiw ilifrcrcirt cspcririienti*rs !odd iiot or did not strike ilie mine point. I 110 not know Iic origin of this tc.ct, lint if it wiis riot ilcsi,~ncdly inveiited n ileceirc tlic piililic :itid Ict tlriiigcrcw lor-tlnsliing oil into Iic iiiiirkct, th:it nt any riitc \vns thr resiilt of its ndoptioii. I'ho present iiictlintl Iixctl liy 1'nrli:iinciit ia the clo.ce test of ;ir Frederick A M . In this rnsc the ciip is kcpt covrrrd vlien bciiig Iientctl, nnd two little liolcs iirc opeiicd for n iiniiicnt wlicn tlie light is iipplicil; wc get the rriic Ilnrliioiiit, tlir lowest temiicnitiirc at which wc mag cspcct nn ~splosion ; iind tliffcrciit csperiniciitcrs get thc sniiic rcsnlt. To fix 100' F. 11s the miiiiiiiiirn d c t y point for oil iit iiii*. cliniiife, \viis, I tliiiik, ii very ren.nnablc tliiiig ; liut ta !hniige tho siifcty point m h i thf! corrrct iiictiiod c t f ledtiiig vns iidopte11, wns very nliwnl. !OW iii the nlcl tcst wan ilioiit 73' iii tlic new, nccoriliiip to certniii cs~ic~riincntcr~, ~i i t l tlic iiiiriiiiiiiiii fnr tlic new t e ~t wns fiseil nt 73''; thnt is, lic i i l i l ti^, giving tin inili~!ntioii fiilsc Iiy 20' or 3oo, w:is ised fnr fixing the ncw d u t y ~iniiit ns if it indicntcd the riitli. \VIini iintiir~illy fisrs tlii! siifcty point for m y :owtry i.r tlic liifiliest ordiiiary tiwilicriitiirc of tlic clininte. A i i nil tlnrliing iit or iiiiilt-r ortliiiary siiiiiiiier ttwperntiircs s d a i i p ~o i i s to hnnillc, Ict nloiic to liiirii. 1 f tciiiprn!iirc in ~ioii*cs is for riinn~li~ :it SO.', i 3 3 fl;isb-poiiit oil is 11s ilrin-;crow 11s IIII~IIIIIU. l'or s:ifcty iii Innilis ivc hiivi! to ndil tliu ~i i * i i t tlc~eliilicd by bumiiig-. n i i d Iicsidc~ tliiit, ntltl II little fnr cnfery to piit tlic: nil6 hirly niit nt' ilic miigu o f piisiblii ~s~ilosioiis. 'l'lio cti~niiioii liigli tcnipcrntiires of' this ciiiintry, 70" :it lcnst, plrcs the Iieiit tlcvt*lii~icil iii tlic oil rvserroir by nrtlinnry lanips iii ortliiiiiry ditty order (20' rit 1e:ist if of