Bomv^.] 
40 
[October 6, 
April last, I have given some expression to my thoughts, but 
not enough to meet my sense of what seems now to be called for. 
DR. CHARLES T. JACKSON. 
Dr. Charles T. Jackson was born in Plymouth, on June 21, 
1805. He studied medicine at the Medical School of Harvard 
University, and in 1829 received the degree of Doctor of Medi- 
cine. Soon after this he visited Europe to complete his studies, 
and while at Paris formed an acquaintance with many eminent 
men, among others with the celebrated geologist, Elie de Beau- 
mont, who subsequently became a warm personal friend, and so 
continued through life. Before completing his course at Cam- 
bridge, he had manifested a strong inclination for other studies 
than those required for the practice of medicine, and had become 
particularly interested in Chemistry, Mineralogy, and Geology. 
Indeed, before receiving his degree, he had already explored, in 
company with his friend, Mr. Francis Alger, a considerable por- 
tion of the Province of Nova Scotia, and made a large collection 
of minerals there, which, being new to foreign cabinets, enabled 
him by exchange to form one for himself of great value. He 
abandoned his profession that he might give his whole time to 
investigation in the branches mentioned, soon becoming known 
as one of the leading scientists of the period in this country. 
Soon after the formation of this Society he became an active and 
influential member, and in 1833 was elected one of its curators. 
Subsequently he became one of its vice-presidents, and continued 
to hold that office until attacked by the malady which abruptly 
terminated his connection with it in 1874. It is, perhaps, not well 
to repeat here what I have written for the historical sketch, and 
which will be found in its pages concerning the great value of his 
services to the Society, but will, however, quote a few lines 
which seem appropriate here. 
“ To no man was the Society more indebted for constant and 
active zeal in its welfare than to Dr. Charles T. Jackson during 
the first forty years of its existence. Others surpassed him in 
laborious work on its collections, when nearly all <Jone upon them 
was by voluntary effort ; but none in a constant manifestation of 
interest in its j>roceedings, as shown by so long and uninterrupted 
