Miscellaneous Intelligence. ' 297 
As far as the writer has observed, none of the Paleozoic corals, or 
Cyathophyllidze, bud by subdivision of disks. Some species have sum- 
mit or disk buds; but these buds grow out from the disk, like those 
which grow from the sides; and are not a consequence of a gradual 
and successive multiplication of the tentacles and widening of the orig- 
inal disk, ending ina progressive subdivision. The nearest representa- 
tives of the ancient Cyathophyllide are to be found in the Orbicelle 
and Caryophylli. But the transverse horizontal septa of many of the 
ancient species have nothing corresponding in these groups though rep- 
resented among the Pocillopore and some other genera of recent Mad- 
reporidee. 
IV. Miscettangous INTELLIGENCE. 
1. On the Extraction of Gold from the Copper Ores of Chessy and 
Sain- Bel ; by Messrs. Attain and Bartensacu, (Comptes Rendus, 
Nov. 19, 1849; Chem. Gaz., Jan. 1, 1850, p. 17.)—It results from our 
by the air or at the expense of the oxygen of its compound, furnishes 
and 1 part of nitric acid of 36°. This is an important point. The 
liquid containing the chlorids of iron, gold (and even of copper, for it 
is difficult to remove this metal entirely by a single ebullition with sul- 
Phuric acid), is placed in contact with iron, which precipitates the gold 
and copper; the precipitate is collected, washed, dried and calcined, 
to oxydize the copper. The gold may be separated from the oxyd of 
Copper and oxyd of iron (for there is always a little of the latter pre- 
Cipitated in the cementation) by sulphuric or hydrochloric acid; but 
the separation, either by fusion or by chlorine or mercury, is prefera- 
Secon Sxnzes, Vol. IX, No. 26—Mareb, 1850. 38 
