48 



INDEX. 



Oculars, iv, 136 



cleaniug. xiii, 99 

 Dr. Schroder's, new. iv, 157 

 high powers in. xii, 128 

 measurements of the power of. 



iii, 103 

 new stereoscopic, i, 201 

 standard sizes for. iv, 35 

 uniformity in. iii, 155 

 Zeiss.' vii, 76, 88 

 Zeiss' spectral, iii, 183 

 CEdipoda Carolina, xiii, 279. xiv, 1 

 Ohio limestone, a study of. G. P. 



Grimsley. xiv, 163 

 Oidium alhicans. xi, 141 



tuckeri. v, 5 

 Oil of cedar for homogeneous im- 

 mersion lenses, iii, 238 

 Oil of cloves, xi, 9 

 Oldham, R. D., llexible saudstoue. 



xiv, 107 

 Oleo in butter, xi, 65 

 Oleomargeriue. ii. 111. vii, 169, 



\x, 33, 215 

 Olfactory lobe in Canida3. xii, 49 

 mucous meml)rane. xv. 219 

 O'Meara, Rev. Eugene, i, 99 

 Ouderdonk, C, movements of dia- 

 toms, iv, 61 

 Opaque mounts, ground for. v, 37 

 objects, mounting, i, 233. viii, 



73, 92. xi, 248. xiii, 41 

 objects, rubber cell tor. i, 



202 

 objects under high powers, i, 

 205 

 Opercularia constricta n. sp. vi, 121 

 Ophrydium adaj. i, 216, 218 

 new species of. i, 1 

 versatile, iii, 199 

 Optical glass, viii, 16 



instruments, Czapski's theory. 

 XV, 182 

 Optical tube length, v, 21 

 Optics, ix, 135 

 Oranges, coloring "blood." xiv, 



357 

 Organ, Spengel's olfactory. viii, 61 

 Organisms,. Bolton's portfolio of liv- 

 ing, vi, 219 

 coloring living. A. Certes. iii, 



224 

 cutting sections of minute, vii, 



137 

 defined, xii, 208 

 fossil in meteorites, iii, 18 

 killing, vi, 178 

 killing delicate, v, 112 

 living, iii, 222 



Organisms, minute marine, iv, 139 

 nomenclature of . ii, 200 

 of cancer, xii, 91 

 staining, living unicellular, iii, 



50 

 study of lower, xv, 1 

 synthesis of pelagic. vii, 189 

 variability of pathogenic. vii, 



201 

 yeast, xi. 111 

 Organs aeration of. xv, 45 



sense in echinoidia. vii, 209 

 Ornithorhynchus, teeth of. xi, 12 

 Orthocarpus purpuresceus. vi, 105, 



xi, 31 

 Osborn, H. L., amphibian brain, v, 



188 

 biology of the frog, xiii, 9, 26 

 cray-fish. (see histology of cray- 



■ fish.) 

 editorial, vii, 172, 193, 211, 



233. viii, 14, 33, 51, 75, 



94, 113, 133, 155, 175, 196, 



215, 229. ix, 176, 213 

 elemeutary biology, xii, 125, 



153, 173, 207, 231, 241 

 examination of mould, x, 1 

 foot in prosobranch gasteropods. 



viii, 209 

 geranium leaf, xv, 325 

 heredity in organic evolution. 



xii, 109 

 histology of cray-fish. viii, 81, 



101, 121, 149, 167, 181. 201. 



ix, 21, 65, 139, 179. x, 



25, 147 

 hydroid animals, xiv, 63, 94 

 hypnotism, xii, 78 

 imbedding animal tissues, xiii, 



116 

 mammalian tissues. xv, 65, 



135, 161 

 penicillium. xiv, 241 

 protococcus. ix, 183 

 protozoa, xiii, 233 

 significance of sex. xii, 65 

 Spengel's olfactory organ in 



crepidula. viii, 61 

 studies for beginners, ix, 41, 



85, 121, 201 

 studies in zoology. xiii, 279. 



xiv, 1 

 the patato. xiii, 87, 105 

 ()s1)orn, Herbert, xv, 92 

 parasitic insects, xv, 56 

 key to pediculidie andmallopha- 



gidaj. XV, 344 

 Oscillaria, motion of. x, 81 

 nucleus in. ix, 213 



