680 ANNUAL KECORD OF SCIENCE AND INDUSTRY. 



young persons devoting themselves to science ; second, abun- 

 dant and well-organized material means for scientific work 

 libraries, observatories, laboratories, collections, etc. ; third, 

 freedom of utterance and publication of any opinion on sci- 

 entific subjects without grave inconvenience ; fourth, the ha- 

 bitual use of one of the three principal languages, English, 

 German, or French, and the extensive knowledge of these 

 languages among the educated classes. IQ A^ February 14, 

 1873,519. 



