Machine for Microscopic Writing. 57 
other end a line only l-125th of an inch long, so that the 
space occupied by any writing executed with this machine 
will be 125^^ or 15,625 times less than that in which the writing 
is traced by the hand. 
Fig. 1. Fig. 2. 
In the present form of the machine, its power is much in- 
creased by the substitution of a compound lever ((7 //, fig. 2) 
for the simple one just described. This is done in the following 
manner : — The original rod having been cut through a little 
above the first stage, the lower portion is attached by its upper 
