]0t ECONOMICAL PROCESS JOR EVAPORATIOK. 



X. 



On the Invention of the Economical Process Jbr Evaporation 

 ascribed to Montoolfier. In a Letter from Mr. St. 

 Amand. 



To W. NICHOLSON, Esq. 

 SIR, 



Economica! Jl HE supplement to the XXVIUth vol. of your interest* 

 processor era- ing ^nd excellent Journal of Natural Philosophy, &c., 

 porationsaWto . ° ,,• , , . ^ i -i 



behivented by ju^^ published, contains an account of a process, abridged 



Montgoiaer. from vol. LXXVI of the Aunales de Chimie published at 

 Paris in Noveuiber last. This process for procuring and 

 accelerating the evaporation of fluids , without employing 

 heat produced by the ignition of combustible substances y is 

 •aid to have been communicated in conversation by Mr. 

 de Montgolfier, This declaration of Messrs. Desormes 

 and Clement, authors of the article in the Ann. de Chim., 

 is not translated in your Journal, which givea only aa 

 abridgment of it: but you may easily turn to it, and I beg 

 you will have th« goodness to satisfy yourself of the fact. 

 I am neither jealous nor envious of the fame of a«y one; on 

 the contrary 1 deem myself happy in having fallen on the 

 same idea and the same means with a man' of deserved ce- 



But Mr. St. Ifbrity : but truth and justice give me a right to claim at 



Amandhas a \^q^i a priority of date in the invention, and to this I shall 

 pnor clatni* r ^ 



confine myself. The following are incontestal»le proofs 



of it. 



fwrofSofthis, After the disastrous and bloody catastrophe of the lOtb 

 <if August, 1792, 1 took refuge in England, wbither I 

 brought with me the same process, which 1 employed my- 

 self in developing and varying in several ways ; giving it a 

 greater extent, and applications more numerous, than those 

 ]rnentior>ed in the Ann. de Chim., or in your Journal, Thes* 

 developements were proposed and submitted to the British 

 govermnent about fifteen years ago. They were known» 

 iippicved^ and patronized by several persojis, distinguished 



fo? 



