Manchester Memoirs, Vol. lix. (191 5), No. \% 19 



each public course of lectures. In addition he gave 

 private courses of lectures to small classes, each with 

 about eight pupils. 



1834. 



During March and April of this year a course of 

 lectures on Meteorology was delivered by Dalton at the 

 Royal Manchester Institution, for which he received 20 

 guineas. 



1835. 



At a meeting of the Directors of the Manchester 

 Mechanics' Institution in 1834, Mr. Benjamin Hey wood 

 was appointed to see Dr. Dalton and to ask him if he would 

 favour the Institution with a course of lectures on any 

 subject. At a subsequent meeting Mr. Heywood reported 

 that he had seen Dr. Dalton " who in a very handsome 

 manner had consented to deliver a course of lectures in 

 the Institution. Dr. Dalton proposed to deliver five 

 lectures on Meteorology and at once agreed to the sug- 

 gestion of fifteen guineas as remuneration." 8 Reports of 

 the lectures, which commenced in March, are given in the 

 Manchester Guardian for 1835, where it is stated that the 

 lectures were well attended. 



Later in the year Dalton gave a lecture at the 

 Mechanics' Institution on the Atomic Theory. To the 

 audience was distributed a lithographed sheet of Atomic 

 Symbols. This lecture attracted great interest, the Man- 

 chester Times of October 25, 1835, reported that "the 

 lecture-room was crowded in every part and the greatest 

 anxiety was manifested by the audience not to lose a 

 single word which fell from the lips of the speaker." This 

 is his last public lecture of which any record has so far 

 been found. 



8 See the Minutes of the Manchester Mechanics' Institution, which arc 

 preserved in the Library of the Manchester School of Technology. 



