ZOOLOaY AND BOTANY, MICROSCOPY, ETC. 



803 



higher power objectives it has no rival, as a 1/16 iu. or even 1/25 in. 

 objective can be used binocularly with full and equal illumination in both 

 tubes. Messrs. Swift & Son now issue it in three forms, two of which 

 are shovpn in figs. 209 and 210, the third form being intermediate in size 

 between these two. 



Fig. 210. 



Fig. 210 shows the binocular adapted to a dissecting stand, the erection 

 of the image being especially convenient for making dissections. 



The instrument can be readily converted into a monocular when 

 required ; the monocular tube is shown in fig. 209. 



Gomont's " new " Botanizing Microscope.* — We often have to comment 

 on our German friends for reproducing as novelties microscopical 

 accessories — notably mechanical stages — which have been in existence in 

 this country for many years. We here have a similar case from a French 

 source, the Microscope described as a novelty by M. M. Gomont being a 

 very old friend. We translate the description verbatim : — 



" Botanical excursions for collecting algae and the lower fungi lose, as 

 is well known, a part of their charm and utility in consequence of the 

 difficulty which the botanist experiences in recognizing on the spot the 

 species which he finds. For these small plants a simple lens, whatever 

 may be its amplifying power, is always much too feeble, and it is absolutely 



* Bull. Soc. Bot. France, xxxiv. (1887) pp. 216-7. 



