378 A. A. Julien on Minerals of the Key of Sombrero. 
trifling loss. With this two water determinations were first 
made, from -048 and .058 grame respectively of unbroken 
crystals, as follows: 
Temperature 
of expulsion. L I. Mean. 
Water, 50°C, | 3-918 wigs 
Water and trace of org. matter, strong ign.) 5°154 | 9827 | ....) 
Total, 9072 | 9°827 | 9°449 
A tendency is thus shown to the expulsion of one equivalent 
(in the formula obtained below) below 250°C., and the reteation 
of the other until ignition. The ignited residues were combined 
and analyzed in the usual manner, with the following results: 
_ Oxygen ratios, 
. se? \ 2 
Water and trace of sii matter,  9°449 8 
Phosphoric ac i 40-139 22:5... 207...4 
gr _ ™ = trace. 
Line, - - - - e-) £000 4 18's Eee 
Alumina and sesquioxyd of iron, 4623 
99: alee 
ae matter, 
_ Alumina, oxyd of i iron, ond thote phosphates, é 01 
pppephate. of pagonsia, trac 
— 8CaO 
45-768. 
PO. - - - 38-701 
ee : oe 9-762 94-231 
aoe . 100-292 
ma oa not think that I can do better than to dedeels this SP; 
to my old comrades, the sea-birds of Sombr » (Ogres, & 
ind) to wien we are mainly indebted for the soni bat of 
it to Ame ori e, and for the formation 
m tabrushite; the eryted differ vestally i in ae 
f the ena 
