238 Scientifie Intelligence. 
Reports of twenty counties, six by Mr. Broadhead, three by Mr. 
Meek, and — = Mr. Shumard, some of which are illustrated 
by maps and sections. 
10. oni Wivheliferous Sand from Frazer River; by James 
Braker, M.D.—This sand, which was obtained in the gold wash- 
in s on Frazer Riv ver, has very ereen the appearance of ‘small par- 
black ~~ “e our gold deposits ; the other is of a yellow color, in 
the form mall ay es, without any well marked crystalline 
structure, a with the e edges rounded by abrasion. The who 
of the sand is stron sich egnetic, so that with the exception of 
a few scales of gold, it contains nothing that is not taken up by 
the magnet. n analysis of the sand shows that it consists 
wholly cf the oxides of nickel and iron. 0°9153 grains of the sand 
carne 0°256 sesquioxide of iron, and 0°6548 oxide of nickel, which 
ould give, supposing the iron to be in the state of magnetic 
sae 0231 of oxide of iron; an e suppose an analogous 
oxide of nickel to exist, we should hier 0-702 of the magnetic 
oxide of nickel; thus making 0-931 instead of 0°9153 the quantity 
used, the excess of 0016 bei eing undoubtedly due to the nickel, 
from the difficulty ove freeing it completely from the potash with 
which it is precipitat 
Although I can find. no mention of such a compound of nickel, 
either in Watts’ Dictionary we Chemistry, or in Dana’s Mineral- 
ogy, yet I have no doubt that the form in which the nickel exists 
n this sand is an oxide with a composition Ni®O*, analogous to 
the magnetic oxide of iron, Fe*O4, thus establishing aarti rela- 
tion between the compounds of nickel and iro rom the large 
proportion of it in the sand, fully 75 per wa it is strange that 
its presence has not been before noticed.— Proe . Calif, Acad. Sei., 
red to yellow, in thin fragments sme $.223°15, H.=4-5. 
When heated phosphoresces ee a inne light. ms fuses easily 
i uble 
rae us the solution, printices gave 
$ Mg Oa N. K Fl S Fe § 
42°22 37-00 756 1°56 tr. 4°78 1:50 5°40 tr=100°02 
Excluding the silica and alumina and the oxygen of the lime and 
soda and averaging the analysis up to 100, von Kobell considers 
abe kjerulfine to consist of B 46-62, Mg 40°86, Ca 5-96, Na 1°28, Fl 5:28, 
m which he calculates the formula to be 2Mg? £+a mi, in which 
a small portion of the calcium is replaced by sodium. This result 
