12 Gee, Dalton's Lectures and Lecture Illustrations. 



the introduction to these lectures see Roscoe & Harden, 

 p. 125. The lectures were well attended. 



1817-18. 



In 1 8 17 Dalton received an invitation to lecture at 

 the Birmingham Philosophical Institute. He dealt with 

 Chemistry. In the following year he again visited 

 Birmingham, this time the lectures being on Mechanics. 

 For each set of lectures he received 40 guineas. 



Writing to his brother on the 13th January, 1818, 

 he expresses his satisfaction with his reception in 

 Birmingham and adds : — 



" I was pleased with the philosophical taste displayed 

 by the Society, especially the leading characters amongst 

 them ; they have an excellent lecture room, a good 

 apparatus in several departments and raise two or three 

 hundred subscribing members of the institution," 



During this year he also gave 1 5 lectures in Manchester 

 on Mechanics, etc., the subscriptions amounted to nearly 

 £S7, the expenses were about £17, which included 

 ;£io. 1 os. for the hire of the lecture-room. 



1820. 



In this year he decided to give Electricity the first 

 place in his lectures. He advertised in Cow dray's Gazette 

 and the Jlauc/iester Mercury as shown below : — 



Lectures on Natural Philosophy. 



J. DALTON intends to commence his COURSE of LEC- 

 TURES on Natural Philosophy on Monday evening, 

 the 6th of March, at seven o'clock, at the Rooms of the 

 Literary, and Philosophical Society, George-street. 



The Course will consist of ten Lectures, viz. three on 



