ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
209 
Powell’s Iron Microscope. — We have received from the President, 
Mr. E. M. Nelson, the following description of, and remarks on, Powell’s 
Iron Microscope, exhibited by him at the meeting on February 15th. 
The accompanying figures (figs. 44 and 45) are the first illustrations 
that have been published of this beautiful and very useful model. It 
was the invention of that eminent mechanician, and father of the 
modern Microscope, the late Hugh Powell, an admirable portrait of 
whom we are able to present to our readers in the present part. 
Fig. 44. Fig. 45. 
“ The date of this instrument is about 1838-40, and a more tho- 
roughly practical and serviceable model, for the work it is intended to 
do, has never yet been designed. 
“ The chief peculiarity in this Microscope is at once apparent, viz. 
that it is mounted at the side of a pillar, instead of on the top of a 
pillar, or between two pillars. There are three important points gained 
by this form of mount : — (1) stability, (2) free access to substage and 
mirror on the right-hand side, (3) compactness. 
“ Powell was wiser than our Continental friends, who, in order to 
avoid the Scylla of bulkiness, have run into the Charybdis of instability. 
“ But some critic may observe that this stand is not so compact as the 
large Continental forms. In reply to this it may be pointed out that this 
