Geology. 429 
Phosphoric acid, - Rot oy ep 
Peroxyd of i iron, SUA etler “TO 14°40 
Alumina, - - - > - 16°60 
Water, - - - - - - 24°00 
Silica, . - - 5 - - . 1°60 
ime,- - ago D ee2gie - 0°57 
By Na; Cl). Mpysnweot: 64 asin ni wl Yeppeen 
100°37 
I detect in = mineral in a few instances, by the aid of the 
croscope, minute plumbago-like scales or lenticular crystals, whisk 
do not appear to be plumbago, or even specular iron 
As the phosphate is represented as existing in quantity, it sug- 
gests a valuable source of phosphoric acid or even of phosphorus 
itself How it can be utilized in agriculture does not appear so 
obvious, 
hae South Carolina, Feb. 13th, 1869. 
pages, vith 108 shotogranine engravings and wood-cuts, and six 
It is aan an oe a portfolio containin ing four 
se 
the Azoic, Paleozoic, Triassic rstetbg us and Tertiary and Teale 
formations in the State, forming a complete geological map dra 
to a scale of half an inch to the mile. Also four other maps in 
oO 
three drawn to a pat of " inc ite ine Cane This voluine i is 
the final report of Prof. Cook of the pects Si authorized by the 
State in 1864. It also embodies in it much of the material con- 
tained in the annual reports of the survey of Dr. Kitchell made in 
e 
detailed and historic seat whi ati as one half the book 
is psa tos to economic geology. 
ning our gears exclusively in this notice to the 
™ wseindinie ” part oi work, we are panes © to see a re (Pedra 
transported on tie N ew J ee a aring th e past year. 
_ Not only “green sand but but “white” sand is very extensively 
