ee 
1379.] 243 | [Kneelar d. 
lime, 24 of organic matter, 22 of soda, and 20 of silicious sand — or 
phosphoric acid 32.29, and lime 28.79 —it was filled with casts of 
_ shells, apparently of Terebratule, probably of tertiary age. The South 
Carolina beds of phosphates are so accessible, that their products 
have almost entirely superseded the guanos in the Southern States 
where they are most required and used. 
It seems to me that these specimens afford a remarkable instance 
of the conversion of modern deposits of organic substances into what 
appears to be an old rock; though known to be modern, and to be in 
process of formation at the present time, all traces of animal origin 
have as completely disappeared as in the metamorphic rocks which 
we are accustomed to ascribe to the combined action of intense heat, 
enormous pressure, and long periods of time. They are interesting, 
too, as stated in the beginning, from the points of view of Economic 
and Chemical Geology, and perhaps of Geological Time. 
RS ' 
. : : Resta | Sere S 
‘S Shee | Ses SRS ess & 
SR ORS 1 OM DM | Ay) wm] 2A 
PCT ied la bert aise ous 20 50 6 16 
PEMaMISOISS cee os 81 4 7.50! 7.50 
eakeno IS; <e s .- 76 11 7 4.50 
Jarvis’ Is. . ... -.|/88.62/50.04) 90 1.68 
se oe Peeser he 4 ek ioe. Ou 3.06 
Bakewsils. ... ..  .|42-34/40.14 1h 5 
aE Eoin i we 2:0 (40. 93/4047 5 .66/much 
Howland’s Is... . ../42 39.65 188} 
ee SOREN SS Pe ley 30.8 -58 
3. Ait Ee 85.20 | 3.00 
3: WA aa ee 46.60 |39.80 6.40 10. 
Enderbury Is. . . ./45.32/41.90} 91.48 | 2.86 
= oT. . ./49.60/41.25| 90.07 |} 4.00 
Ke mS Cot A 38.76] 84.68 }17.00 
oC Cae Mee 29.5 64.00 |much little 
S. Carolina. . . .(28.79/82.29| 60.00 |10.00 Qo 
MOMPNKCTOS ves. ee 85 to 96 
1 Complete Analysis.— Carb. Acid 1.76 — Alumina 3.86 —Water and organic mat- 
ters 3.63 — Soda, a trace— Magnesia, Potash, and Silica apparently present, but 
undetermined. . 
Botile specitmens—Phosphate Lime: (1) 79 per cent.; (2) 75 per cent.; (3) 70 per 
cen’. 
Pi 
, 
= 
a 
Psa 
aw 
— See oe te 
oe 
= 
= opp agree 
