346 THE AMERICAN MONTHLY [Nov. 



river in Washington and the Colorado river in the south. 

 Some of it escaped through California by means of 

 Feather river and Sacramento and San Joaquin rivers. 

 It flowed to the Pacific before the Monterey rock con- 

 taining Bacillariacese was formed, and is older than that 

 rock which contains marine shells and is contemporan- 

 eous with the Hichmond, Pennsylvania, Spain, New 

 Zealand, Algiers, and Denmark deposits. These are all 

 Oligocene Tertiary. 



I believe fresh water Bacillariacese were older than 

 marine Bacillariacese. For they are found in the Newark 

 (Triassic) sandstone and in the older Silurian. 



Special Staining Methods in Microscopy, Relative to 

 Animal Tissues and Cells. 



By dr. G. p. UNNA. 



[Translated from the German by Geo. W. Gale, M. D., F. R. M. S., London, 



St. Louis.] 



ACID NUCLEI. 



The teaching of the relative independence of those micro- 

 organisms, which we call cells, within the large organism 

 of an animal or vegetable body, has been the predomi- 

 nating one for more than a generation. We think, 

 conscious or unconscious, cellular physiologically or 

 cellular pathologically (Virchowlogically, if I may be 

 permitted to so express myself, even if in more recent 

 times — and correctly — from different sides), noteworthy 

 efforts are being made to detect the life peculiar to the 

 intercellular substance and fluid tissues, and in part even 

 to bring the anatomical cells under the jurisdiction of 

 those substances. Although at present we do not deal 

 with structureless "juices" and amorphous layers, but 

 with substances the closer examination of which is made 

 possible by the chemical reagent and the microscope, yet 



