An Account of a Method of Measuring the Comparative Intensities of the Light Emitted by Luminous Bodies. By Lieutenant-General Sir Benjamin Thompson, Count of Rumford, F. R. S. In Two Letters to Sir Joseph Banks, Bart. P. R. S.
New Experiments upon Gun-Powder, with Occasional Observations and Practical Inferences; To Which are Added, an Account of a New Method of Determining the Velocities of All Kinds of Military Projectiles, and the Description of a Very Accurate Eprouvette fo