Hairs, multicellular, multicellular non-branched, illustration, 75 multicellular, multiseriate branched, of Shepherdia, 78 multicellular, multiseriate branched, 77, 82 multicellular, multiseriate branched, illustrations, 79, 81 multicellular, multiseriate non-branched, 74 multicellular, uniseriate branched, illustration, 76 multicellular, uniseriate non-branched, 72 multicellular, uniseriate non-branched, illustrations of, 73 Hand cylinder microtome, illustration, 34 microtome, 31 microtome, illustration, 31 table microtome, 34 table microtome, illustration, 34 Horehound, powdered, description of, 237 powdered, illustration of, 238 spurious, powdered, description of, 237 spurious, powdered, illustration of, 239 Hypoderm of seeds, 289 Hypodermal cells, of leaves, storage function of, 179 illustrations, 120 structure of, 118 Hypoderms, of klip buchu leaf, 260 of ruellia root, 221 Illumination for microscope, 26 Indirect cell division, 54, 55 Inner bark of white pine, 248 epidermis of seeds, 291 Insect flower leaves, powdered, illustrations of, 268 stems, description of, 241 stems, powdered, illustration of, 240 Insect flowers, closed, powdered, illustration of, 279 open, description of, 280 open, powdered, illustration of, 281 powdered, description of, 278 Intercellular spaces, 158 illustrations of, 160, 161 Internal phloem, of spigelia stem, 235 Inulin, illustrations of, 195 Karyokinesis, 54, 55 Klip buchu, cross-section, illustration of, 261 powdered, description of, 262 powdered, illustration of, 263 Labeling, 47 Latex cavities, 176 tube cavities, 176 tubes, 142, 144 tubes, illustration of, 145 vessels, illustrations of, 146 Leaf epidermis, 59 illustrations, 60, 61 Leaf parenchyma, conduction by, 150 Leaves, diagnostic structures of, 267 stomata, 260 Lenticel, illustration of cross-section, 159 Lenticels, ærating function of, 157 structure of, 158 Linin, 54 Long paraffin process, 29 Machine microtomes, 32 Measuring cylinder, 40 illustration, 40 Mechanical stage, 21 stage, illustration, 22 tissue, 89 Medullary ray, 139 bundle, 139 bundle in tangential-section of quassia wood, 258 cell, 141 cell, arrangement of, in the ray, 142 cell, structure of, 142 cells, in cross-section of quassia wood, 254 cells, in radial-section of quassia wood, 258 cells, in tangential-section of quassia wood, 258 cells, of ruellia stem, 237 Medullary rays, illustration of cross-sections of, 143 illustration of longitudinal section, 140 in cross-section of quassia wood, 254 in radial-section of quassia wood, 254 of pink root, 221 of ruellia rhizome, 227 of ruellia root, 223 of spigelia rhizome, 226 of white pine bark, 250 Mesocarp of celery fruit, 285