46 Tlie American Geologist. juiy, it-gs 
I. II. III. IV. V. VI. 
SiO, 57.97 60.98 60.10 55.05 51.30 58.64 
1.07 
Al„()3 .09 .10 .42 ( 
Fe'jOg .11 .12 S 
FeO .18 .19 1.00 1.60 1.83 
CaO 15.05 14.64 12.73 31.35 25.21 20.25 
t^ T* (/ \ m o ^ 
MgO 22.45 23 62 24.31 12..53 16.47 18.83 
MnO trace .47 
K^O .12 .13 
Na.,0 .20 .21 
PI,() at 100^ . .03 
H;0 above 100= 2.57 
CU, 1.69 ' 5.91 
.15 .39 .45 
F ' .78 
100.46 99.99 99.96 100.00 IO11.88 100.00 
I. Tremolite pseudomorphs after salite, Canaan, Ct. , Hille- 
brand. 
II. The same recalculated with water removed and CO^ re- 
moved as CaCOj. 
III. White tremolite from Fahlun, Sweden (Dana's System of 
Mineralogy, 5th ed., 1868, p. 2.30). 
IV. Salite from Canaan, Ct. , M. D. Munn (Ibid, 0th ed., 
1892, p. 356). 
V. Canaanite, Canaan, Ct. , B. S. Burton, (Ibid, 5th ed., p. 
8.03). 
VI. The same with CO, removed at CaCO.,. . 
These analyses show that the alteration of the salite of Canaan 
to tremolite is not true paramorphism, the change involving a 
loss of lime and a gain of magnesia. The specific gravity of the 
tremolite pseudomorphs is 2.9, that of salite analyzed by Mr. 
Munn was 3.33. 
It is quite possible that a portion of the tremolite contained in 
the dolomite at other localities near Canaan is derived in this 
way, but the manner of occurrence of much of the tremolite goes 
to show that it is formed directly from the recrj^stallization of 
the dolomite and its admixed quartz. 
P-sfiidomnrplts tiftcr Feldspar froni Norfolk TdintsJn'p. Ct. 
In the summer of 1889, I visited the Norfolk granite quarry, 
which is opened in Cambrian gneiss. There were noticed near 
the quarries blocks of much the same material, in which were 
well rounded nodules up to an inch and more in diameter. They 
