766 | General Notes. [Aug 
that a difference between the angles of singly- and doubly- i 
refracting regular crystals does not exist. | 
BOTANY.? 
one of the agents in developing this interest and directing 
into useful and effective channels. This work of the club, 3 
accomplished nothing more, would fully justify its existence 
Now, let the botanists continue their efforts for the a 
ment of the botanical work in Washington. Let there be 4 a 
mand for adequate provision for the increase of the Herbar | 
| many excellent collectors who might be ae : 
ac’ season to thoroughly explore certain locgjities at CO radi 
tively little expense, while the results would Be of vas 4 
to the botany of the country. ; alli 
Some such plan as this must be adopted if anything 3t have 
to be done for botany. The government surveys appear z 
* Neues Jahrb. f. Mi i 
* Bet by Prof: Cuktas È. Wty, Lincoln, Nebraska: 
