The law and practice of hall-marking gold and silver wares. By J. P. de Castro. Pp. xiv+372. London: Crosby, Lockwood & Son, 1926, Price: 42s
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1926
- Weight
- 147 KB
- Volume
- 45
- Category
- Article
- ISSN
- 0368-4075
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✦ Synopsis
CIZEMISTRY AND INDUSTRT
JIW. in, i w j ciit out. t.liosc prricticnl iiistructioiis diicli :ire iiot witliiii his owi knowleclgc.
I ti t x o chapters Jlr. \:liittiiker dcpiirts froni tlic gencr:iI scliciiic of tlic I)ocik, :iiitl instcnd of telling iis Iiow t o :ippIy :I pnrticiilnr clnss of ctycs to din'crciit fibres, tells 11s i v h t (1yc.q to iise for pnrticiilnr fibrcs or iiiistiircs. Tlie clinptcr on tlic clyciiig of uiiion iiintcrinls is iiot SO inforiiint,irc ns t,lirit on tlic tlj-cing of :irtificinl silk. In this we iirc givcii n list of direct cotton dycstiiffs, with i i i i i w m l s nttnclictl to iiidicnte tlicir Icvelliiig propcrtics o i i artificinl silk. 'J.'liis list will be found very iiscfiil i t i st.lcctinp dycstiifTs lor coriiples miscd slindcs, tliosc tlytiiffs with Ie\dliiig iiuiiibcrs olosc togctlier conihiiiing, in :I tlyeiiig scnsc, bcttcr t l i u t i those with iiuiiilms fiir apart. This clnssificiitioii is also of olwioiis iisc i n +elect.iiig clycstuffs for iitiioii f:il)rics coiitniiiiiig m-tificid .<ilk.
111 ct.liicliision, wc very \v:iriiiIy rccoiiiiiicnd this I)ool;, but11 10 t h yoiing chemist stnrt.iiig iti d~c\vorlis'iiiitl to th: t?spericnccd tlytr. Tlic foriiicr will find in it, :I Siiitling hand frotii tlic Iiihoriitory to tlic dyclio~isc, i i l i d tlic l:ittt!r ii wviiItIi of suggwtioii : i d a I I I C ~I I S of iisSotriitkiilg his priicticnl cqmiciice with clicniicd thcory. rl:.\crICAL G r,,\ss N ~\ s l I ~u l , , \ ~l ~l o s .