and the Mode of its Communication. 29 



The results of each experiment were entered on a 

 separate sheet of paper ; which paper was previously 

 prepared for that use by being divided into separate 

 vertical columns by lines drawn with a pen, and ruled 

 in parallel horizontal lines with a lead-pencil. 



" Experiments on Heat, made at Munich, nth March, 1803. The 

 large cylindrical Vessels, No. I and No. 2 (made of thin sheet brass), 

 were filled with hot Water, and exposed to cool in the Air of a large 

 quiet Room. The Ends of both these Instruments were well covered 

 with warm Clothing, Furs, &c. The vertical polished Sides of 

 No. I were naked. The Sides of No. 2 were covered with one 

 Thickness of fine white Irish Linen, which had been worn, 

 strained over the metallic Surface." 



The above is an exact copy of one of these regis- 



