EPOCH OF DE LISLE AND HAUY. 229 



rately disciplined in mathematics. In all his rea- 

 sonings upon particular cases, Haiiy is acute and 

 clear; while his general views appear to be sug- 

 gested rather by a lively fancy than by a sage induc- 

 tive spirit : and though he thus misses the character 

 of a great philosopher, the vivacity of style, and 

 felicity and happiness of illustration, which grace 

 his book, and which agree well with the character 

 of an Abbe of the old French monarchy, had a 

 great and useful influence on the progress of the 

 subject. 



Unfortunately Rome de Lisle and Haiiy were 

 not only rivals, but in some measure enemies. The 

 former might naturally feel some vexation at find- 

 ing himself, in his later years (he died in 1790), 

 thrown into shade by his more brilliant successor, 

 In reference to Haiiy 's use of cleavage, he speaks 8 

 of "innovators in crystallography, who may pro- 

 perly be called crystalloclasts" Yet he adopted, in 

 great measure, the same views of the formation 

 of crystals by lamina 9 , which Haiiy illustrated by 

 the destructive process at which he thus sneers. 

 His sensitiveness was kept alive by the conduct of 

 the Academy of Sciences, which took no notice of 

 him and his labours 10 ; probably because it was led 

 by Buffon, who disliked Linnaeus, and might dislike 

 Rome as his follower ; and who, as we have seen, 

 despised crystallography. Haiiy revenged himself 



8 Pref., p. xxvii. 9 T. ii. p. 21. 



10 Marx. Gesch. d. Kryst. 130. 



