MEMOm OF PALLAS. 21 



and physics, and also improved his acquaintance 

 with mineralogy, in the environs of that city. 



In the spring of the year 1759 young Pallas 

 removed to Gottingen ; and though prevented by a 

 long and dangerous illness from prosecuting his 

 studies w^ith his wonted ardour, yet he reaped much 

 benefit from the instructions of the physicians Roe- 

 derer and Yoegel, and improved his general know- 

 ledge by diligently availing himself of the many 

 rare books belonging to the library. During his resi- 

 dence at this celebrated university, he made numer- 

 ous experiments on poisons and the effects of the 

 most potent medicines, applied himself to the dis- 

 section of animals, and made many observations on 

 worms. On the last named subject, he at this time 

 composed an ingenious treatise under the title " De 

 in/estis Viventihus intra vivmitia,"* in which he seems 

 to have taken great pains to discriminate these noxi- 

 ous animals, and to have described many of them 

 with singular accuracy. 



In July 1760 Pallas was attracted to the univer- 

 sity of Leyden by the fame of its celebrated profes- 

 sors, Albinus, Gaubius, and Muschenbroeck ; and 

 by them he was noticed as a young man of pro- 

 mising genius and indefatigable application. In 

 December he took his Doctor s degree, and distin- 

 guished himself by his inaugural dissertation, in 

 which he defended by new experiments, the treatise 



* See list in the Appendix, where we have given as com- 

 plete an enumeration as we could of the titles of his works, 

 chronologically arranged. 



