408 Scientific Intelligence. 
ently crystallize in the isometric system, is one which has been 
‘widely discussed in the past few years. Brauns has made an 
compound was accompanied by strong double-refraction. 
tension should exist.—Jahrb. Min., ii, 102, 1883. 
Il. Grotocy AND MINERALOGY. 
trated by the maps and sections. He adds to the above cause the 
fact that the warm current carried abundant food for the lite of 
the reef, and urges that this cause must have generally had great 
al reefs. Pro- 
fessor A 
coral reefs of the West Indies the bottom may have been bronghs 
f 
begin to grow by the accumulations of calcareous relies made 
through the growth of other species or through uplifts of the sea 
vated coral reefs in Cuba, San Domingo and other West India 
islands, made chiefly of recent corals, as evidence that such Up- 
liftings have occurred; and states also that the Shell-limestone, OF 
‘Coquina,” of St. Augustine, off portions of the east shore of 
* This Journal, II, xxxv, 197, 1863. 
~ 
