β Scribed by Morell, R. S.
No coin nor oath required. For personal study only.
Birmingham Section. 1IY 11. s. JlOIiilELL, >I.'.. 1'II.D. Tho literntriro on tho csnniinntion of tiirpcntino ia vory cstcnsiro ant1 i t is iinnccorsnry to giro inoro tlmn two reftmnccs to tlic niost rccciit coinpiclicnsirc cont ril)iitions on t l l C subject. Jiiclinidson nntl l3oircn (this J.. 1905. 27, tila) linvc rsprtwcd their prcforence for tlic following mothod of cstiinntiti!: tlic nniuirnt c.f pctrolciiin in ntliiltortrtotl plinrnincouticnl tiiqwntino :-l+nctionnl distillation of tlio tiirpcntinu coinl~iiicd with tho tletcrniinntion of tho rcfrnctivc intlos of tlw distillntion frnctions for cncli 6 ' C. They arc nblc to tlrtcct ndultcrntioii of Aincricnn turpcntlno wit11 Anirriciiii ~ictrolci~in to 1.6 licr ccnt. rrror. J. Jlnrciivson [Cliom. Zeituiig, 331 lins rccoiniiicndctl n ~nodilicntioii of 13iirtoii's iiiatliotl [Aniiir. Clirni. Jour. 12, 1021 for tlic cstinintion of pctrolcilin. Tho turpontinc is ositli~ctl by coiiccntratctl nitiia iicitl nnd tlic qunntity of Iirtrolcutii pr(wnt is dotcrniincd Iiy tlio wiglit of tho iin~rttneltrd spirit nnd l ~y tho twiglit of 1110 nitro cum-poi~ntls scpnrntcd froin the prodi~cts of ositlntion of tliu tur )entint.. Tliu nnnlyticnl urror of tlic iiictliotl is stntcd Froiii scvcrnl ycnrs osiioriciicc in tlic csnniinntioi! of :\rncricnii tiirpriitinc 1 rcly cliiolly on tlir bclinrioiir of tile oil on fractionnl distillntion. Using n Yoiiiig's I:! biilb clcplilcgnintor, n good Anicrirnn tiirlicntino givcs nlioiit 90 per cont. distilling ovcr bot\rccn 186'' nncl IU5"C. Tlic vnrint ion in tho 1)olinvioiir of hi& clnss Anioricnn tur~irntino on frnotiontrl tlistillntion is rcry siiinll froin ycnr to ycnr.
r\ny nltorntioii in tho coloiir nntl snioll of tho turpontino is nccoinpniiicd by n clinngo in tho quantity and qunlity of tho frnctions.
1 liaro found that n modificntion of Armstrong's p l yiucrisntioii niotliotl [this J., 1882, 4781 gnvo vury sntisfnctory rcsults niid wnsnccurntcto witliiti 2 por cciit. Tlie originir~ mothod of Arnistrr.ng iins I>C~II sovordy criticiscti. Thcrc \rns nlwnys an error nrisiiig froin tho dificu1t.y in scl)nrntiiig tlic iiiinttnckctl pctroloicni froni tho litiiiitl contnining tho polynicrisctl turpcntino. 1 foiind tlint tho
π SIMILAR VOLUMES
The small world method devised by Milgram and his collaborators (1967Milgram and his collaborators ( , 1969Milgram and his collaborators ( , 1970) is a procedure aimed at tracing acquaintance chains in a large population.
## Abstract This paper discusses the BossakβNewmark algorithm, which is an extension of the wellβknown Newmark algorithm^1^ for the numerical integration of the equations of discretized structural dynamics problems. The extra parameter introduced here enables the method (when used on the test equat