Vi 
CELL THEORIES, 
Stricker’s article on ‘‘The General Characters of Cells,” in his 
‘“Human and Comparative Histology.” Published 1868; translated 
by Power, 1870, 
Beale, in Todd, Bowman and Beale’s ‘ Physiological Anatomy and 
Physiology of Man,” 1866 and 1871, 
IN placing the titles of these books at the head 
of this article, I purpose less to review them 
than to refer to the opinions of their authors in 
illustration of a general survey of the conceptions 
at present prevalent, with regard to the vital units 
of living bodies, 
Observation is more a means than anend, The 
end is to arrive at an accurate conception of the 
processes of nature ; and very different conclusions 
are arrived at by different men, founding their 
1 Reprinted from the Quarterly Journal of Microscopical Science, July» 
1873. The article, as it originally appeared, contained a criticism 
of the views held by the late Professor Hughes Bennett, but it has been 
deemed unnecessary to reprint that part at the present date. A few 
added sentences are placed within brackets, 
