IVhen attcniptiiig 11 critical survcy of thc physical stritlies which hnve been inndc on plnstics i t is nccessiiry to iliriclc t,lie su1)jcct~ into three main sections : 1. Studies of tlic ruw nintcrinls used in the ~i i i i i ~u f i ~cture of plnstics. ' 3. Physicnl tests 011 the resulting plast
The electrical and general physical properties of plastics
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1940
- Weight
- 587 KB
- Volume
- 59
- Category
- Article
- ISSN
- 0368-4075
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β¦ Synopsis
CHEBl'ISTRY AND INDUSTRY 637 cliildrcii nntl of prcgiiniit, and nursing \voiiieii (\vlio should in the iiorinnl course of things c o ~i s ~~i ~~c protective foods in Inrgcr quantity tl!nii tlic rest of tlic populntioii), niust coiit:iiii 420 I.U. pcr Iiciltl per dny.
Tlicsc cstiiiintes of stniitlnrd reqiiirciiiciits iiiust not bc coiifusctl witli tliosc oii thc " ritltilt 10or 1 I-stoiic iiielc " bnsis.
\'hcii tliesc striiidnrtl per hcntl pcr tlny rcqiiirciiiciits arc coiiipnrctl witli tlic iiitnkcs iiiclicntctl in T i i l ~l ~ 'Ill it is clcnr tlint a t Iciist linlf of the polnilnt.ioli of Grent 13rit;iiii lins :it hest it iiinrgiiinl h', iiitnkc \vliilc tlic otlicr Iinlf lins nii iiitake irliich is qtiitc insulliciciit, for frill Iicnltli niid, iii tlic cnsc of t:liildrcii, iiinsiiiiiiiii riitc of growtli. \'illinins : i i d Spiesil Iinve iiitliciitetl soiiic of tlic coiiiiiioii cliiiicnl coiitlitioiis wliicli iiiny nrise ns :I resiilt, of siicli deficiciicy, niitl tlic ~~rc~~r11eiicc of such coiitlitioiis iiirip to n Inrgc estciit I)c nttri1)utiiblc to siich tlcficiciicy. Tnspcction of 'hblcs 11, I', V ant1 1'11 rereiil the priiicipiil soiirces of U , in 13ritisli diets. Tlic 1,~Ik of our iiitnkc is o1)t:iiiictl froiii flour itlit1 potntocs supplenieiitctl in tlic Iiiglicr iiicoiiic groups froin pigiiiciit.
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