246 [Oct. 5, 
Robinson, ] 
can minerals. In 1882 he analyzed the sulphuret of 
molybdenum from Chester, Pa.; chromate of iron from 
Maryland and Pennsylvania; the tabular spar pyrox- 
ene, and colophonite, of Willsborough, N. Y., and the 
Maclurite (chondrodite) of New Jersey (in which he 
independently discovered fluorine as Dr. Lanstaff had 
done before). He also analyzed the manganesian 
garnet, found with the cheisoberyl at Haddam, Conn., 
and the chrysoberyl of the same locality, In 1830 he 
analyzed the Tennessee meteorite of Bowen, since 
which date I have been unable to find any further con- 
tributions from Mr. Seybert, whose attention was un- 
fortunately diverted from science, to which his early 
life was so advantageously devoted, to other and less 
fruitful lines of investigation.” 
It is to be regretted that Professor Silliman knew 
but little of the occupations of Mr. Seybert after the 
death of his father in the spring of 1825. Being the 
only living descendant of his father and mother, he 
inherited a large fortune, and it is certainly not singu- 
lar, that a young gentleman of twenty-three years of 
age, who had inherited a fortune estimated by his con- 
temporaries at $300,000, who had been occupied 
closely for several years in the laboratory, in chemical 
and mineralogical investigations, which had made him 
an honored member of our body, and given him a 
name and reputation among the scientists of Europe, 
at the early age of twenty-two, but who had at that 
time seen nothing of the great world, should have 
