264 
(A. ANALYSES OF BRAZILIAN CORALS. 
BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
L. R. Lenox, Analyst. 
I II III. IV у. VI. 
а o % з = | шы 
зе Е 5 + E Bo 
Malta E | 
FOUND, ES £42 32 So SS за 
Ge | Ske Ca | ee | Je ва 
Ea 52 Sa Фа Bs EY 
S? | се AE ЗЕ ES RA 
5S 38 | л a: 
Ss | mi A Š се 
Silica (510,) 05 08 12 05 08 .03 
Oxides of Iron and Alumina 
(ALOs, Fez03). (ur .09 20 22 08 ‚07 
Lime (СаО) 54.41 | 64.29 | 54.13 | 52.83 | 54.80 | 53.41 
Magnesia (MgO) 24 20 ‚20 ‚25 21 99 
Sulphuric acid (80g) 52 54 | not not not 1.56 
deter. | deter. | deter 
PROBABLE COMBINATIONS. 
Silica (5104) .05 08 12 05 .08 03 
Oxides of Поп and Alumina 
(AL Os, Ее,Оз) 07 09 .20 22 08 07 
Calcium carbonate (СаСОз) 96.52 | 96.28 | 96.66 | 93.44 | 96.96 | 93.80 
Magnesium carbonate (MgCO;) 50 42 54 52 44 | 2.08 
Calcium sulphate 88 91 | not not not 2.14 
deter. | deter. | deter. 
Organic matter, Sodium chlo- | not not not not not | not 
ride deter. | deter. | deter. | deter. | deter. | deter. 
sã Totals 98.02 | 97.78 | 97.52 | 94.28 | 97.56 | 98.12 
(B.) AnaLYsIS or THE Rupr Rock or Ponta ро MANGUE, 
STATE OF ALAGÓAS, BRAZIL. 
R. E. Swain, analyst. 
Jaleium oxide (CaO) 
Magnesia (MgO) 
Iron (Fe,0,) 
Alumina (A1,0,) . 
Sodium (Na) 
Carbon dioxide (00,) 
Silica (8105) 
Phosphoric anhydride с, о). 
Chlorine (Cl) 
Water (H,O) 
Total 
No. 1, No. 2. 
46,01 46.08 
6.95 7.05 
0.85 0.88 
0.56 0.59 
trace trace 
42.94 42.96 
1.27 1.29 
0,27 0.26 
0.81 0.28 
( M9 O 
00, 95 100.11 
