336 Life of John Henry Lambert. 



to him in executing his ideas, and where he also piiblishecf 

 his Photometry J enriching tlicrcby mixed mathematics with 

 a new branch. In the sajr:e year he was also elected mem- 

 ber of the electoral Bavarian society of" sciences, on condi- 

 tion that he should give them his assistance, and transmit 

 tracts ibr their Transiictions. He faithfully performed his 

 engagement with that society ; but nevertheless experienced 

 a great deal of ill treatment by them, and even was de- 

 prived of his salary, which prompted him to return his 

 diploma. He now visited Eriangcn, where he published 

 his letters upon the construction of the universe, as well as 

 his treatise upon the, principal qualities of the orbits of tlie 

 comets. In 1763 he went to Leipzig, where he in the 

 vear following published his new Organon. On an excur- 

 sion he made in the same year to Berlin, he was introduced 

 to Frederic II., who upon the first interview was convinced 

 that he fully deserved the admiration of all men of science, 

 and ordered him to be electedaregularmemberof theacademy 

 of Berlin ; which appointment afforded him full leisure to de- 

 vote himself entirely to his favourite sciences, and to com- 

 municate to the world the fruits of his lucubrations. 



A areat number of Lambert's treatises are to be found in 

 theTransactionsof the literary societies of Leipzig and Berlin; 

 and as many have been printed separately, all these treatises 

 bear the stamp of an eminent genius, who had derived his 

 knowledge more from his own reflections than from books, 

 aaid always found means of placing the subject of which he 

 treated in a poiiit of view in which it had not been consi- 

 dered before. 



His principal metaphysical work is his Architectonic. He 

 composed this elaborate work with a view of showing the 

 application of logic in metaphysics, and of evincing the 

 possibility of carrying it to algebraic evidence. 



Most of his mathematical treatises were published by 

 himself, in three volumes, under the title of Beytrdge z//m 

 Cchrauch der Maihematlc unci deren Anivendiing, in which 

 almost every branch of mathematics has been enriched with 

 additions and important improvements. 



Frederic II. largely added to his pension a short time 

 before he died ; and after his death evinced in the strongest 

 manner hi^ sincere concern at the loss which the sciences 

 suffered by it. 



Lambert vv'as as universally esteemed for his amiable cha- 

 racter, as he was respected for his scientific merits. The 

 manner in wluch he had been educated had, indeed, left in- 

 delible traces of his originally low situaliou in life, which 



manifested 



