274 



Sir Francis S, Darwin on the 



[Oct, 



The mode of using it will be obvious from the subjoined 

 examples : 



Example 1.-27^ Cent. 66° Fahr. 



= 25\.... r45-0Fahr. -32 



+ 2/,...1 3-6 



48-6 

 + 32-0 



80-6 



Example 2.-33-25 Cent. 



t= 30-00 -^ ....r54-0 Fahr. 

 + 3-00 I... J 5-4 

 + 0-25 J .... L 0-45 



59-85 

 + 32-0 



34 



30 

 4 



}::{ 



16-6 Cent 

 2-2 



18¥ 



91-85 



48f75 Fahr. 

 -32 



16 



5*5 Cent. 

 3-3 



0-388 

 0-027 



9-215 



Having thus brought to a conclusion an attempt to condense 

 into a brief abstract the most useful parts of M. Ramond's 

 Instructions, I propose, in a future communication, to subjoin 

 an outline of the demonstration of the formula ; together with a 

 few remarks on one or two other points connected with the 

 subject. B. P. 



{To be continued.) 



Article VII. 



Notice upon the Volcanic Island of Milo. By Sir Francis S. 

 Darwin, MD. &c. (With Plate XXII.) 



(To the Editor of the Amials of Philosophy.) 



SIR, Buxton, Aug. 20, 182S. 



Observing your analysis of the water from what you call 

 the boiling spring of Milo, in the July number, 1819, of the 

 Annals of Philosophy y^ I presume that the following description 

 of that island, taken from my manuscript journal, may be inte- 

 resting ; I beg to offer it, and shall be happy if it affords any 

 information to your readers. 



I remain, Sir, your obedient humble servant, 



Francis S. Darwin. 



• 0. 8. »v. 27 : lee aI«o p. 68 of the present volume. 



