PAGE.
Darcet, M., on Diamonds ... ... ... 62—63
Davy, Sir H., on composition of Diamonds ... 64
De Beers Diamond mine ......82—87—88—91
De Boot, cleaved Diamonds ...... ... 54
---------on de-colouring Diamonds ... ... 59
Demantoid ............... 264
Derby, Prof., Ο., on Brazilian Diamonds 107—109—110
Despretz, M., on Diamonds ......... 67
Dewar, Prof., on Diamonds ......... 68
Dewey Diamond ... ... ... ... ... r35
Diamond ... ... ... ... ... 52
---------composition of ...... ... ... 62·
---------cutting of ... ... ... ... ... 24
---------drill ............... 144
---------engraving of ... ... ... ... 37
---------origin of ... ... ... ... ... 69
---------use of ... ... ... ... ... 44
Diamonds, African ...... ...... 75
---------Australian ...... ... ... 96
---------Borneo ... ... ... ... ... 102
---------Brazilian......... ...... 106
---------British Guiana ............ 117
„--------Indian ............... 118
---------Russian ............... 133
---------United States ............ 134
Diamantina ...............109—115
' Dichroiscope ..........„ ... 318
Dichroite ............... 268
Dimetri, M, on Siam Ruby mines ...... 158
Dispersion of Light ............ 315
---------in Diamonds ... ......... 57
Double refraction ., ... 316
Drill, Diamond ...... ... ... 144
Dry-diggings, for Diamonds ...... ... 81
