t 



\ 



JO 



OF 



NATURAL PHILOSOPHY, CHEMISTRY, 



AND 



THE ARTS. 



AUGUST, 1805. 



ARTICLE I. . 



jin Account of fonic new Experiments which prove that the Tern" 

 perature at ivhich the Denfity of Water is a Maximum, is 

 Jhveral Degrees of the iiiermometer above the freezing Point, 

 By Benjamin Count of Rumford, V. P. R. S, Foreign 

 Jjfociate of the National Infiitute of France, fyc. SfC, Rc" 

 ' ceived July 16, 1805, from the Author ; with a Letter dated 

 Munich, 25th June, 1805. 



In my feventb elTay, in which I have treated of the propaga- Phenomena 

 tion of heat in fluids, and alfo in a paper publiflied in the T ^^"5 

 PhilofophicalTranfa<5tions for the Year 1804, Part I. ; in which from the maxi- 

 I have given an account of a curious phenomenon frequently "^""^ denfity of 

 obferved on the Glaciers of Chamouny, I have afcribed the higher than * 

 melting of ice which is placed (by detign, or by accident) ^"^^^ing tem- 

 belovv the furface of ice-cold water, to currents of warmer 

 water, which, in certain cafes, are fuppofed to dtfcend in 

 that ice-cold liquid : but as this fuppofed fa6t has lately been the h€t <juef- 

 called in queflion by feveral perfons, and as the explanations ^^°"«'^' 

 I have founded on it muft fall to the ground, unlefs it can be 

 fupported, I have been induced to re-confider the matter, 

 and to give it a careful and thorough invetligation. 



Vol. XL— August, 1805, Q The 



