1893. ] NEW YORK ACADEMY OF SCIENCES. 93 
source ever since. J.ists of minerals have been published from 
time to time as follows: Vanuxem and Keating in 1822 
(Jour. Phila. Acad. of Sci., ii. 287) mention twenty-nine, in 
which list, dysluite, automalite and “spinelle” figure as three. 
Samuel Robinson in his catalogue of American Minerals, ete., 
1825, pp. 162-173 mentions forty-nine, of which ten are worth- 
less or repetitions, and four others are varieties of the spinel 
group, involving but two species (gahnite, automalite, spinelle, 
dysluite), three others, augite coccolite, and jeffersonite are 
closely akin, as are tremolite, actinolite, and hornblende. This 
leaves about 35 admissible ones. Dana’s Manual of Mineralogy, 
first edition 1848, p. 870, gives 34, of which about 4 are repeti- 
tions. Dana’s System of Mineralogy, 1868, mentions but 38, of 
which 8 are varieties and one is doubtful, leaving 29. F. A. 
Canfield 1889 (N. J. Geol. Surv. Final Rep. Vol. ii. p. 3), 
gives 77 of which 19 are varieties and 3 are doubtful species, 
leaving 55. One or two others are mentioned elsewhere which 
are not in his list, such as barite, niccolite, chloanthite, 
desaulesite,axinite. Dana’s System of Mineralogy 1893, p. 1066, 
mentions 56, of which 11 are varieties or doubtful. To the above 
list Iam able to add Thorite. This occurs in the granitic dike 
of the Trotter Mine with allanite and zircon. It forms small 
masses, a half inch across, of irregular outline. It is dark brown, 
translucent in thin splinters, infusible, gelatinizes, and yields 
micro-tests for thoria. It is isotropic under the microscope, 
probably from alteration. The mineral was found while in 
company with Prof. P. Groth. 
The accompanying list contains all those mentioned above 
with the first authority by whom they were cited, and in case of a 
new species, or variety, or of a special description the paper is 
cited. The species are numbered, but varieties and doubtful 
Species are not. The standard test of species is the late edition 
(1893) of Dana’s incomparable System of Mineralogy, in which 
those receiving separate numbers in the text and printed in full 
faced type in the index are estimated species, while all others 
are grouped as varieties or as doubtful. 
C stands for F. A. Canfield, N. J. Geol. Surv. Final. Rep. 
Vol. ii. 3, 1889. D 1848 for Dana’s Manual 1848. D 1868 for 
Dana’s System of Min. 1868. D 1893 for Dana’s System of 
Min. 1893. R for 8. Robinson, Catalogue of Amer. Minerals, 
1825. Vand K for Vanuxem and Keating, Jour. Phila. Acad. 
Sci., ii. 287, 1822. F means Franklin Furnace, O Ogdensburgh. 
Actinolite, see under Amphibole. 
Algerite, doubtful species, being altered scapolite. T. 8. Hunt, 
Amer. Jour. Sci. ii. VIII. 103, 1849. 
