~ 
A, A. Julien on Minerals of the Key of Sombrero. 369 
These results are equivalent to water 65, guano 1:53, sulphate 
of lime -75, chlorid of alaminum ‘35, chlorid of calcium °30, 
chlorid of magnesium “11, chlorid of potassium *20, and eblorid 
of sodium 95:-46=99°25. 
‘he crystals were found to be ver 
deliquescent in an atmosphere saturated 
with moisture, absorbing more than 
their weight of water after a few days 
exposure. <A sketch of a crystal mag- (27{ 
ah about fifteen diameters is given /jf)/7 
1n 1. (Patt be 
gravity =2°953-2:°99 
v 
owdered mineral in aleohol and in pure benzole, at 60° F 
rittle. 
Gently heated in a closed tube before the blowpipe, it at once 
gives off water, darkens with a slight empyreumatic odor, and 
bead which is clear and colorless, both hot and cold; when 
nearly saturated, the bead is clear and slightly yellowish while 
hot, transparent and colorless when cold, and becomes milk- 
white and opaque by flaming; with a still larger excess it is 
slightly yellowish and giao ioe while hot, and becomes white 
and opaque on cooling. ith carbonate of soda on charcoal it 
fuses readily to a clear and colorless glass. It dissolves easily 
(even after ignition) in nitrie and hydrochloric acids, but very 
slowly in acetic and tartaric. When boiled with water in a test- 
tube the water gives a strong acid reaction with litmus; most 
3 t ‘This Jour, [2], xxxix, 43. 
