2 Gee, Daltoris Lectures and Lecture Illustrations. 



crumbling portions and to provide others with a backing 

 of paper. In most cases, however, the sheets are in an 

 excellent state of preservation. 



The diagrams have been divided into two groups, 

 those relating to : — 



1. Mechanics, Physics, Astronomy and Meteorology. 



2. The Atomic Theory. 



It was decided to prepare catalogues of these two 

 groups, and to include a description of any of special 

 interest. 



In carrying out this task it was found that it would 

 be essential to examine the Dalton Manuscripts in the 

 possession of the Society, especially with the object of 

 finding references to the use of the diagrams. Among 

 the manuscripts and miscellaneous packets of papers, a 

 number of Lecture Notes and Syllabuses of Courses of 

 Lectures were found. 



Hitherto the accounts published of the lectures of 

 Dalton have been very incomplete, and few have realized 

 the important position that his lectures have had in his 

 life-work. It is intended later to detail certain of these 

 lectures more fully ; meanwhile, the following summary 

 has been prepared. 



Part I. 



John Dalton's Lectures. 



In 1787, when Dalton was twenty-one years of age, 

 he added to his school duties that of giving lectures. He 

 announced in a printed syllabus 1 — a framed copy of which 

 is on exhibition in the Society's rooms — that twelve 

 Lectures on Natural Philosophy would be read at the 

 School at Kendal if a sufficient number of subscribers 



^This syllabus is reprinted in "John Dalton and the Rise of Modern 

 Chemistry," by Sir H. E. Roscoe, 1895. ^ ee P- 43* 



