Manchester Memoirs, Vol. lix. (19 15), No. 12. 11 



In a small memorandum book some of the lectures 

 are written out almost in full. Lectures 15 to 20 have 

 been transcribed and printed. 5 



He informs his brother in April, 18 10, that his twenty 

 lectures were attended by an audience "of 1, 2, or 3 

 hundreds and he received the strongest marks of appro- 

 bation." 



The fee for the lectures was again 80 guineas and 

 Dalton estimates his expenses for 7 weeks at ,£35. 



1811. 



In Coivdroy's Manchester Gazette (January 19th, 181 1) 

 Dalton advertises a course of Lectures on Experimental 

 Philosophy and Chemistry to be given at the Lecture 

 Room of the Literary and Philosophical Society. He 

 states that the course will be nearly the same as that he 

 delivered in London. In a letter to Jonathan Dalton, 

 dated 4 mo., 29, 181 1, he writes: "The engagements I 

 allude to above have been to give a course, or rather two 

 courses of lectures on Natural Philosophy and Chemistry, 

 which have required extraordinary exertion, as 1 was 

 obliged to attend a good deal of private tuition in the 

 meantime. They continued for 10 weeks and ended about 

 a fortnight ago. — The produce of the lectures was nearly 

 .£130, which exceeded any I have had before." 



For these 20 lectures he prepared a new syllabus, 

 which includes the subjects of Mechanics, Hydrostatics, 

 Pneumatics, Hydraulics, Electricity, Galvanism, Optics, 

 Meteorology, Astronomy and Chemistry. The last sub- 

 ject included Heat. 



1814. 

 In this year Dalton gave a course of Lectures on 

 Natural Philosophy and Chemistry in Manchester. For 

 5 See Roscoe and Harden. Chops. I. and IV. 



