INVERTEBRATA, CRYPTOGAMIA, MICROSCOPY, ETC. 



1077 



instrument in a horizontal position (with the lamp attached to the 

 substage bar) for drawing, measuring apertures, &c. 



Mr. Bulloch claims to have improved the construction of the 



Fig. 140. 



sliding ghiss sUigt^ ; as jiroviously niiul»\ tlicro was ulwiiys a liability 

 to II siiililcii slipping of tli(! slug*' if tlif jNIicrosfopo wcrr acridrntally 

 jiirrod. I>v using two pressure points iittod on one bar that turns on 



