PHILOSOPHICAL 
TRANSACTIONS. 
I. The Croonian Lecture. Microscopical observations on the 
suspension of the muscular motions of the Vibrio Tritici. By 
Francis Bauer, Esq. F. R. S. F. L. S. and H. S. 
Read December 5, 1822. 
The Croonian Lecture has usually been given by Members 
who had made Physiology their particular study ; and I 
should not have ventured upon this task, had I not been en- 
couraged by one of our Vice-Presidents, w r ho has now, for 
some years, applied my microscopical observations in pro- 
moting physiological enquiries into the more minute parts of 
animal structure. 
Without his authority, I should not have ventured to bring 
forward the following observations, respecting the length of 
time the moving powers of an animal, too small to become 
the object of sight without the assistance of the microscope, 
can have its action suspended, and again, by a change of cir- 
cumstances, renewed. 
This, he is induced to believe, is one of the most curious 
facts respecting muscular motion that has hitherto been as- 
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