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POPULAR SCIENCE MONTHLY 



high. While the subject of this article can be expected to admit of 

 only a limited discussion of photomicrographic apparatus and its 

 manipulation, it has seemed best to thus briefly mention a few points 

 on the modus operandi of the work that one may the better comprehend 

 its value. 



To convey an idea of the scope of photomicrography in its applica- 

 tion to the study and subsequent presentation of the details of objects 



Fig. 8. 



Fig. 9. 



Fig. 10. 



Fig. 11. 



Cross Section of Juniper Stem showing Three Resin Ducts. X 50 Diameters. 



Longitudinal Section of Linden. X 90 Diameters. 



Cross Section of Sugar (Jane. X 50 Diameters. Polarized Light. 



Wing of Seed of Ecoremo-carpus. x SO Diameters. Polarized Light. 



in nature we may well begin with the inanimate substance and finish 

 with the living animal organism. Time was when men referred to the 

 ' everlasting hills' as though such portions of nature were unchangeable, 

 but modern geologic science has shown that the face of nature is ever 



