XIX. A letter from Mr. John Ellicot, F. R. S to the President, concerning the specific gravity of diamonds

As, from some Experiments I have lately had the Opportunity of makeing, it appears highly probable, that what has formerly been published concerning the specific Gravity of Diamonds, is not to be depended upon; I hope a short Account of these Experiments will not be unacceptable to you, especially as I do not find the least Notice taken of the specific Gravity of Diamonds in any of the Tables published in thelosophical Transactions .