IV. A letter from Mr. Stephen Gray, giving a further account of his water microscope.

Abstract

Sir, My Experiments and Observations Microscopical, having been thought worthy to be incerted in your Philosophical Transactions, I presume the Additions and Improvement I have now made to the Water Microscope may be no less acceptable, I therefore herein send you its Description and Use according to my last Contrivance whereby it not only renders Objects more distinct, but is much more Commodious for Observation.