398 THE AMERICAN MONTHLY [Dec, 



New Support for the Microscope (Plate 4 figures). Coutant 225 



Synura. — A Plant Injurious to Drinking Water (Plate 6 figures). 



Whipple 257 



Crystals of Tartrate of Soda, (Plate) 289 



Histology of the Geranium Leaf (Plate 10 figures). Osbom 325 



Apparatus for Indicating Position of Objects (i figure). Gage 338 



Relative Sizes of several Different Micro-Organisms, (Plate). 361 



Number of Micro-Organisms iu Water, (Two Diagrams) 380 



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