American journal of pharmacy . side of diameter. Short X 10 13 X 8-5 13 X 7 15 X 12 Av., 13-5 9-38 Alexandria side of diameter. Short X II 17 X 10 10-5 X 9 Av., 14 10 Tabi,e 2. India at random with two-thirdsobjective. Some long andsome short diameters. I41-6 15 1*212 Alexandria objectivediameter, taken at ^51-81-6 Av., 1-38 Av., 17 Tabi,e 3. India cells of upper sideof leaf, two-thirds objective. 171-80-615 Av., 1-4 Alexandria cells of upper sideof lea
American journal of pharmacy . side of diameter. Short X 10 13 X 8-5 13 X 7 15 X 12 Av., 13-5 9-38 Alexandria side of diameter. Short X II 17 X 10 10-5 X 9 Av., 14 10 Tabi,e 2. India at random with two-thirdsobjective. Some long andsome short diameters. I41-6 15 1*212 Alexandria objectivediameter, taken at ^51-81-6 Av., 1-38 Av., 17 Tabi,e 3. India cells of upper sideof leaf, two-thirds objective. 171-80-615 Av., 1-4 Alexandria cells of upper sideof leaf, two-thirds objective. I 91-8 1*52*3r60-607 Av., 1-48 Am. .Tour. , 1»<7. Alexatidria and India Senna. \o\ AVERAGES EXPRESSED IN MICRON!\BLE I. India side of X 26-815 India diameter, 4002 India side of leaf, 40-6 Tablk 2. Tablk 3. \r- Alexandria .Senna. Lower side of leaf. 4004 X 286 Alexandria diameter, 49-3, Alexandria .-o/. fi^. 2. India Aenna, upper side of leaf; a, epidermal cell ; />, stomata ; r,hair (scarcely in focus) ; e, uebeuzellen. Nevertheless, it is not to be denied that sections of epidermismay be found in which the India senna may exhibit the largercells. A series of about forty measurements, made by a student inthe school here, .showed that while the larj^cst cells are found in \02 Alexandria and India Senna. { Am. Jour. , 1897. the Alexandria senna, the average size of the cells of the Indiasenna may be somewhat greater than those of the Alexandriasenna. Likewise, the cell walls alone will not serve as a point ofdifferentiation, owing to the same lack of uniformity. As regardsthe shape of the cells, no distinctive value whatever can be placedupon it, owing to the great variability present. The same may alsobe said concerning the arrangement of cells around the hairs. The
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