Diamonds
TRANSCRIBER’S NOTE
Basic fractions are displayed as ½ ⅓ ¼ etc; other fractions are shown in the form a / b , for example 1 / 144 or 5 / 12 .
Harper’s Library of Living Thought
DIAMONDS BY SIR WILLIAM CROOKES HARPER & BROTHERS LONDON & NEW YORK
Frontispiece.
SIR WILLIAM CROOKES
LL.D., D.Sc., F.R.S.
Foreign Sec. R.S., Hon. LL.D. (Birmingham), Hon. Sc.D. (Camb. and Dubl.), Hon. D.Sc. (Oxon. and Cape of Good Hope); Past Pres. Chem. Soc., Brit. Assoc., Inst. Elect. Eng., Soc. Psych. Res.; Hon. Mem. Roy. Phil. Soc. Glasgow, Roy. Soc. N.S.W., Pharm. Soc., Chem. Metall. and Mining Soc. of South Africa, Amer. Chem. Soc., Amer. Philos. Soc., Roy. Soc. Sci. Upsala, Deutsch. Chem. Gesell. Berlin, Psychol. Soc. Paris, “Antonio Alzate” Sci. Soc. Mexico. Sci. Soc. Bucharest, Reg. Accad. Zelanti, Aci Reale; Corresp. Inst. de France (Acad. Sci.), Corresp. Mem. Bataafsch Genoots. Rotterdam, Soc. d’Encouragement pour l’Indust. Paris, For. Mem. Accad. Lincei Rome.
WITH 24 ILLUSTRATIONS
LONDON AND NEW YORK HARPER & BROTHERS 45 ALBEMARLE STREET, W. 1909
TO MY WIFE
William Crookes
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·DIAMONDS·
Cape Colony
River Washings
The Pipes or Craters
The Kimberley Mine in Old Days
The Compound System
Underground Workings
The Depositing Floors
Washing and Concentrating Machinery
Automatic Diamond Collector
The Yield of Diamonds
Falling off of Yield with Depth
Stones other than Diamonds
Graphite
Crystallisation
Hardness
Density or Specific Gravity
Phosphorescence of Diamond
Conversion of Diamond into Graphite
Tribo-Luminescence
Absorption Spectrum of Diamond
Refractivity
The Diamond and Polarised Light
The Diamond and Röntgen Rays
Action of Radium on Diamond
Boiling- and Melting-point of Carbon
A New Formation of Diamond