8 Gek, Daltoris Lectures and Lecher e Illustrations. 



1806. 



The success of the Lectures induced him to repeat 

 the course in the following year and lie inserted in the 

 Manchester Mercury and Harrop's General Advertiser an 

 advertisement . — 



LECTURES 

 ON NATURAL PHILOSOPHY. 



J. Dalton intends to deliver a course of Lectures on 

 Natural Philosophy, comprising Mechanics, Pneumatics, 

 Electricity, Galvanism, Magnetism, Optics and Astronomy ; 

 together with the doctrines on Heat and Pneumatic 

 Chemistry, containing recent discoveries on those subjects. 

 The whole to be illustrated by experiments with select 

 apparatus, executed by the most modern artists. 



The course will consist of about twenty Lectures. 

 Tickets for the Course £2. 2. Each ticket admits a 

 Gentleman and a Lady, or two Ladies. If the proposal 

 meets with encouragement, the Lectures will commence 

 about the end of January, in a central situation in Man- 

 chester, of which due notice to the subscribers will be given. 



Those who wish to become subscribers will please give 

 in their names at Clarks' or Thomsons' Booksellers, or to 

 J. Dalton, No. 10, George Street, 

 January 6, 1806. 



He wrote to his brother on the 30th Nov., 1806: — "I 

 am very busy, being in the midst of a Course of Lectures, 

 and having a good deal of private tuition besides." The 

 lectures added considerably to his small income. The 

 total receipts were ^65. 9s. 6d., which after deducting 

 expenses gave him a balance of ^58. 2s. od. 



1807. 



This year marks an important era in his lectures. 

 He went to Edinburgh and he tells us that " soon after 



