F. has communicated to the world. Allen.] Correspondence with Linnaeus-- 1747 to 1751. Correspondence with Gronovius of Leyden -- 1743 to 1755. Correspondence with Doctor Alexander Gardner of South Carolina-- 1748 to

1768. Correspondence with Doctor William Douglass of Boston-- 1720 to 1747. Correspondence with Mr. John Bartram of Pennsylvania -- 1742 to 1747. Correspondence with Mr Peter CoUinson of London, F. R. S. 1740 to 1769. Sundry letters from Mr Samuel Pike, Doctor Fothergill and Doctor PoterfieUl of

London. Correspondence with the Rev. Samuel Johnson, Connecticut -- 1743 to 1747. Correspondence with Doctor Whytt of Edinburgh-- 1758 to 1763. ^Letters to Doctor John Bard of New York on the small pox-- 1747 to 1764. Correspondence with James Alexander Esqr of N. York, on the King's Council^

1747 to 1764. Correspondence with the Earl of Macklesfield on astronomical subjects.

There are besides the above a great variety of other papers on public affairs among his MSS., and it is stated that he left " An Inquiry into the operation of Intellect among Animals" -- a piece of great originality; another, "On the Essential properties of Light;" "An Introduction to the Study of Physic," in form of instructions to one of his grandsons and dated in the 81st year of his age; and "An Inquiry into the causes producing the phenomenon of Metal medley swimming in water," but of the condition of these MSS. we have had no opportunity of judging. A Biographical Sketch of Dr. Colden by Dr. Francis is to be found in the American Med. Reg. ; another attributed to the Hon. G. Verplanck, in the Monthly Recorder; and a third in Eager's Hist, of Orange Co. Allen's Biog. Diet, and Rees' Encyclopffid. also have articles on the same subject. It is to be hoped that the public will yet be furnished with a more ample account of the character, studies and public services of a man who acted 80 distinguished a part in the History of New York from 1720 to 1776.