NOVEMBER 11, 1955, is the hundredth anniversary of the birth of Sir D'Arcy Power. He died at an advanced age only 14 years ago, so that his memory is still green in the minds of many of us, and it is
Sir Frank E. Smith, K.C.B., F.R.S.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1933
- Weight
- 136 KB
- Volume
- 52
- Category
- Article
- ISSN
- 0368-4075
No coin nor oath required. For personal study only.
β¦ Synopsis
CIlElllISl'RY AND INDUSTRY
29 its first introc1uctfion as n commercial product. iinininl pancrcnscs forth tltc raw nintcrial, n.liich is dclivcred fresh to the fnct,ory and immcdintcly frozcn. It is then ground to n fine state and carricd to apparatus in which cstraction with nlcohol is' effected. After trciitxncnt with various rcngcnts thc cstrnct is adjrtstcd to tlic riglit dcgrcc of ricirlity, filtcrcd, ccntrifagctl, nntl driccl in low-t,cinpcratiirc viicitiiin iippiirrttiis, tlic fin:il product Lcing n piire white powder with n strcngtli of 20 units per inilligrrini, t h t is, ten tinics thc potmcy of Biinting's originiil ntntcrinl. Evcry 13.D.l-I. product must pass rigid tcsts before it IC:IVCS the factory, r~ucl in the
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In 1888 I became an assistant to Dr. J o h n Murray in the Challenger Office and during the past twenty-six years I have been intimately associated with him and with his work. It is therefore somewhat appropriate that I should have been asked to write this Appreciation, and perhaps I may be forgiven