4 Gee, Dalton s Lectures and Lecture Illustrations. 



he sold ten ios. 6d. tickets, one at 5s., and a number of 

 odd tickets bringing in a total sum of £y. 15s. od. His 

 expenses were £1. 6s. od., giving him a profit of £6. 9s. od. 



1803-1804. 



In 1803 Dalton went to London and on his return to 

 Manchester he wrote to his brother : — 



" . . . . I have fallen into business again much as 

 usual, except with regard to private pupils, who have 

 nearly all of them left the study of Mathematics and 

 Natural Philosophy for that of military affairs, for a season 

 at least. 2 I have not heard from the manager of the 

 Royal Institution yet since I left London ; am therefore 

 undetermined on that head." This last sentence refers 

 to the arrangements respecting a course of lectures (for 

 which he received a fee of 80 guineas) which he com- 

 menced at the end of 1803 and concluded on the 23rd 

 January, 1804. 



The Syllabuses of the lectures issued by the Royal 

 Institution show that they covered a wide range and 

 included Mechanics, Electricity, Magnetism, Optics, As- 

 tronomy, Use of the Globes, Sound, Heat, Constitution 

 of Mixed Gases, and Meteorology. A search for notes 

 relating to these lectures has not been successful, the 

 only details available are from his letters/' He tells us 

 that it required great labour to get acquainted with the 

 apparatus at the Royal Institution and to draw up the 

 order of experiments and repeat them in the intervals 

 between the lectures. However, with the aid of an ex- 

 pert assistant, not one of the experiments failed. The 

 first lecture was written out completely, and the evening 



- In 1S03 the second war with France was declared. This is the only 

 reference that I have found in Dakon's letters to the French wars (1803- 

 1815). 



:; See " .Memoir of John Dalton," by R. Angus Smith, pp. 55-5S. 1856. 



