1895. 



MICROSCOPICAL JOURNAL. 



371 



photo-micro^rapliy would still be the recreation of the 

 few, instead of the practical realization of the many. 



With the general introduction of gelatine dry plates of 

 such exalted sensitiveness that the light of an ordinary 

 lamp sufficed for exposures with quite high powers, and 

 portable cameras adapted for use with any microscope 

 having an inclinable body, the making of a negative of 

 almost any microscopical object, was brought within the 



reach of every worker. The printing, however, was not 

 so satisfactory, especially where large numbers were re- 

 quired in the illustration of papers or books. But, as in 

 the past, the steady advance in photographic methods, 

 speedily supplied the existing need, photogravure and 

 other process methods reproducing the negative in positive 

 form with wonderful exactness, delicacy and cheapness, 

 so that at the present day, papers upon any subject may 

 be illustrated in a manner utterly unattainable a short 



