i 
J. Lawrence Smith oni the Inverted Microscope. 235 
chemical support to go with his general instrament, but those 
familiar with it know how awkward it is for manipulation, al- 
though exceedingly ingenious, and, doubtless, as perfect as could 
be for attaching to his instrument. Feeling then the want of 
_ something more effective, I was led to the construction of the 
Inverted Microscope, entirely with reference to its chemical uses ; 
other purposes to which it might be applied being of secondary 
consideration ; but I would here remark, that since its comple- 
tion, its value even in this latter respect yields to no other form 
of instrument, and has induced me to change its original designa- 
tion of Chemical Microscope to that of Inverted Microscope, as~ 
the former name might mislead as to the extent of its uses. 
It was important for the arrangement in question, so to have 
the relative position of the stage and eye-piece, that the eye, 
while on a level with the latter, could readily see the former and 
guide the required manipulations. 
it 
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tion of it, that will be readily understood by referring to the 
figure. The most important part is a four sided prism, with the 
