gg ON THE MAXIMUM DENSITY OF WATER. 



The bucket-engine at frton-Hall, in Cumberland *, i$ 

 faid to raife one gallon of water 60 feet high by 36 gallons 

 fupply ; hence, if the wade water be included, it appears 

 that our machine will not be competent to perform half as 

 much work by the fame fupply, and its peculiar advantages 

 muft depend upon its durability when conftantly employed. 

 I am, Sir, 



Your's refpe&fully, 



WILLIAM CLOSE. 



V. 



Remarks on Count Rumford's Experiments relating to the 

 . Maximum Denfity of Water. In a Letter from Mr, John 

 Dalton. 



To Mr. NICHOLSON; 

 SIR, 



Count Rum- IN your Iaft Number, page 225, is an interesting article on 

 ncs on P the ^ e c l ue ^ : ' on > At what point of temperature water is of greatefi 

 max. denfity of denfity ? From the introductory paragraph I was led to expect, 

 TJ"*f°** that all the material objections to the current doctrine were 

 confidered and obviated, and that new and convincing argu- 

 ments in its fupport would be adduced. In the former of 

 thele expectations I was altogether difappointed ; and though 

 the new experiments are ingenious and well worth attention, 

 they are not quite fo demonnVative to me as they appear to 

 be to Count Rumford. Perhaps we may both be too ftrongly 

 biafied towards preconceived theories : however this may be, 

 it feems proper that when new facts are brought forward, we 

 ought to reconcile them to the theory efpoufed. 

 Mr. Dalton's At page 93 of Vol. X. of this Journal, I have ftated a num- 



exper. in this b er f f a $ s anc j experiments which appear to me irrecon- 

 ftai^fobjedh cileable with the notion of water being denfeft at 40°. I 

 believe it is denfeft at 32°, or the freezing point ; and it is 

 my prefent intention to (hew how, on my hypothefis, I ex- 

 plain Count R.\s refults. 



* See Philof. Journal, Vol. II. p. 60. 



Water 



