J'lic npptiratiis is kcpt iiwiy I'rom tlic dniigcr i t m i , :md tlic contnincr is brouglit to i t niid couplcd up. t\ hydrogen fliinic, fctl froni tlic spccial cylinrlcr on tlic Icft, is tlicri burnt in tlic Iii~iil> housing, iind iidjustcd to :I I d g b t of 10 111111. by the iiiicro tiip u~iclcrnc:~tli. This Uiunc ig vicwed citlicr tliroiigli i i spccinl cycpiccc or uiidcr t i dnrk cloth, iiiitl the sniiq)lc from tlic contiiiiier is fed tip from belo\* through it. scrics of spccinl ports and griuzes wliicli iict RS flrunc triips.
If inll:un~nnblc wpour is p s e n t in the siiniple, tlic c11iir:icter of thc flamc? iiltcrs, rind ii typical bliic f1:iiiie cap ii1)pciirS. Froni tlic size m d iipliciirnncc of this it. is quitc siinplc, with wry 1itt.l~ cspcricncc, to asscss tlrr perccnt:igc of inll~iinniiililc vnpotir in tlic siiniplc wit11 r ~~i ~i i r k ~~b l c nccuriicy. I. think tliiit on cs;iminiition Incnibcrs 12s. M., Pcllo\vs of t . 1 ~ Cliciiiiciil Society ~O Y . , Indexes. Indcscs to Loth Jouriinls iiiid to Abstructs A and I3 for 1638 will bc ready bcforc ICastcr nud Gstributioii will tlicii bcyin iniiiicdintcly to nll nicmbcrs uud subscribcrs of 103s. Clniius should bc lodgcd with tho Ccucrd Sccrc~ary in C~IBCB of noon-rcccipt by April 20, or cquivnlciit cliitc if al~rond. MEETINGS OF THE SOCIETY April 3. Edinburgh Section. Joint iiiccthig with t l ~u Zastit.utc of Clicinistry. Authrriquiuo~~e Club, C:riingc~iioiitli, at 7.30 [ ~i . London Section. Ihirlinyt~on I-l'ousc, l'icciidilly, 1,011d011, w, I , Ill; 8 Il.111.