โ Scribed by Bannister, C. O.
No coin nor oath required. For personal study only.
CHIDIISTRY AND INDUSTRY 93.5 t:otiipnny, iind 111.. Alexander Bcrgiisson (it director of tlic Podcrosa Mining Go~iipniiy) has hccn :ippoiiitcc\ iiiniinging tlircctor. ' L' lic dent11 is aniioiinccd of JI. :liciid i\Iiisse: a promiiicnt ligiirc in tlic Frcncli giis indiistry r i n d vice-prcsidciit of tlic Etnblissciimits Knliliniiiiii. Safety in Miner Research Board A tletnilcd iiccouiitf of nil ii~ipiiriit~~is tlcsigiiritctl '' ii \viivc-specd ciiiiicrn " is givcii iii ii p a p by W. 1'iiyli1illi iiiirl I', C. F. Slieplicrd, cntitlctl '' Tlic pressiirc \vnvc sent out by tin csplosivc. 'Part 11." (Safety iii JIities Rescurcli 13oiiril Pnpcr No. 29, I-1.11. St:it.ionery Oficc ; pricc Is.) 'l'lris apparatus wiis devised to o1)tnin records of tlic riitc of prop:ig:ition ot 1-lic shock :ind 1)rcsstirc-\vitvcs scllt out :ill csplosivc, tlic rate of projcction of tdic Iliinie iintl products of ilctotititioii, niid t.lieir rclat,irc positions ;it cacli instiitit nftcr t,lic shot hiis bccn fired. 'I!h espcriiiieiit,s Irnw shown that tltr Hiunc of ii No. 6 t l C t ~J l l i i t O r ncvcr conics into contiict ivit.11 t.lie estcniiil :itmosplicrc, being iil\v:iys siirrouiidctl I)y ii '' 1)liiiiket " of tion-conil)iistiblc p x s , t,lie prodwts o f tlctoniitioii. This fact cspliiins tlic inri1)ility of tlic fliinic of :I (letontitor to i p i t c :I niistiirc of firetliitlil~ ii1111 iiir.
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