122 Scientific Intelligence. 
ca 
Exterior layer. Body of rock. 
0 NET ne mer ETS F5 39°01 
i - - - - 310 0°22 
Peroxyd of iron, - + iigsce 0°34 O11 
Phosphoric acid, - - - 39°92 43°50 
Calcium, - - - - 1:34 —_— 
Fluorine, - - . - - 0°85 — 
orgy - - - - 0°75 trace 
Shieh fore exteaidar idl Oh 
Swear id, - 2°07 7:08 
Water and — matter, - 860 10°75 
Sand, - . 0-02 0-02 
100°36 100°69 
The relative proportions of the different constituent mapas. above 
given, necessarily lead to the following state of their a cae on 
Exterior = 
Tri-phosphate of lime, —- - 77°71 
contaiming of lime. - - 41°76 
* phosphoric acid, - 35°95 
Tri-phosphate of magnesia, - - = - == GFT 
containing of magnesi - 3°10 
 phoxphors acid, - 367 
Phosphate of iron, - - 0°64 
Fluorid of calci es - - 1:76 
Chlorid of oa - - - - 1:18 
Sulphate of sod Piel otis, 3°68 
Water men: organic matter, fas af 8°60 
Sand, ct Net 0-02 
100°36 
Body of the rock. 
Common phosphate of lime, weet ie 82°48 
coutaining of lime, - .- - . 3404 
“ water, - 6544 
“ phosphoric acid, - 43-00 
Common phosphate of magnesia, - 0°66 
containing of m magnesia, - - 0°22 
water, - . 005 
= - phosphoric acid, - 0°39 
Phosphate of iron, - 0°22 
Sulphate of lime, - - - - 12°05 
containing of lim - - 497 
- stigtnais acid, - 7-08 
Water and a Ongpnic matter, - - 5°26 | 
Sand, al 0-02 | 
100°69 
seen from oe that in both parts of the rock the phos 
phoric acid is present in the form of a tribasie phosphate (containing 
