cf Olof Torlcrn Bergman, 195 



3 ear 1777 they allowed him an animal falary of 1^0 rix-dol-" 

 fa rs from their funds in order to defray the expenfe to which 

 he was expofcd by his experiments. Though mod of his 

 time was occupied with natural philofophy he (iill retained 

 his tafte for entomology : he difcovered a mcw fprt of gall- 

 apple in the bark of the oak; wrote a diiTertatidn on the- 

 faw-fly, • tenthredo ; on the worms fo pernicious to the 

 pine-fir; and, towards the latter part of his life, he wrote 

 on the care and management of bees. 



In the year 1758, in conjunetion with fome of his friends, 

 lie had eftablifhed a cofmographical fociety^ who undertook 

 to give a defcription of the earth. The phyfical part was 

 allotted to Bergman ; and when it appeared in 1766, it was 

 fo well received that the whole edition was fold in the courfe 

 of half a year: the work was foon after tranilated into Ger- 

 man, Danifl), French, and other languages. A fecond edi- 

 tion, much enlarged, appeared in 1773 under the title of 

 A Phyfical Defcription of the Earth. In this work Bergman 

 difplaycd a greater knowledge of mineralogy and chemiftry 

 than was expelled ; and his reputation as a chemift was ftill 

 further increafed by a dillertation on the method of preparing 

 alum, which he publilhed afterwards. In confequence of the 

 la ft- mentioned work he was appointed profeffor of chemiilry 

 in 1767. About this period, in confequence of a propofal 

 which he made, a new laboratory, models, various kinds of 

 apparatus, and a new^ houfe for the profeiTor, were provided. 

 Under fueh eircumftances it is not to be wondered at that, 

 befides his young countrymen, pupils from diftant parts 

 /lioukl be anxious to repair to Upfal, that they might profit by 

 tlie iaftru6lion of a man who had acquired fo much celebrity. 



liis pupils admired not only his zeal and diligence in com- 

 municating inftru6lion and in making experiments, but the 

 wonderful perfpicuity with which he explained the mod dif- 

 ficult fubje6\s. Bergman, however, did not confine himfelfp 

 to oral inftruclion: he enlightened the world by his. writings; ' 

 and his firft attempt this way was Schefier's Chemical Lec- 

 tures, which he arranged, and enriched with valuable ob- 

 fcfvations. His next publication was an Introdu6lion to 

 Chemiftry 5 • and this was followed by his Sciagraphia of the 



B b 3 Mineral 



