THE 
AMERICAN GEOLOGISl". 
Vol. XXIV. DECEMBER, 1899. No. 6 
BIOGRAPHICAL SKETCH OF 
ISSACHAR COZZENS, JR. 
By Capt. a. W. Vogdes, San Juan, Porto Rico. 
(Portrait.) 
Issachar Cozzens was a well known chemist and geologist, 
and one of the pioneers of the American school. 
He was born at Newport, Rhode Island, December 15th, 
1780, and died at Guttenberg, New Jersey, April 17th, 1865. 
He was descended from Revolutionary stock, his father, Is- 
sachar Cozzens, was born in Providence, R. I., Aug. 21st, 1754, 
and died in New York, Jan. i8th, 1840, having served as a sol- 
dier and fought at Bunker's Hill. The wife of the elder Coz- 
zens was a Miss Mary Daniels. 
Issachar Cozzens, Jun., served in the War of 1812, and was 
a leading member of Tammany Hall in its early davs, being 
treasurer of the society at one time. 
He married Mary Ann Spinks April 14th, 1810. She died 
Sept. 6th, 1855. They had five daughters, the eldest, Debora 
Barnard Cozzens, died Nov. 14th, 1898. The youngest three 
were drowned at West Point, New York, June 22nd, 1838. 
The second daughter is still living. 
The name and fame of Issachar Cozzens as a geologist are 
identified with the geology of the city of New York, from 
his well known "Geological history of Manhattan or New 
York Island, together with a map of the Island, and a suite 
of sections, tables and columns for the study of geology, par- 
ticularly adapted for the American student, published in New 
