304 
Secretion cells, of klip buchu leaf, 262 
of white pine, 248 
Short paraffin process, 29 
Sieve cells, of klip buchu leaf, 262 
of pink root, 221 
of ruellia rhizome, 226 
of ruellia root, 223 
of ruellia stem, 235 
of spigelia stem, 235 
Sieve plate, 138 
illustration of, 137 
Sieve tube, illustration of, 137 
tubes, introduction, 136 
tubes, structure, 136 
Simple microscope, introduction, 3 
Slide box, 48 
box, illustration, 48 
cabinet, 49 
cabinet, illustration of, 49 
forceps, 45 
forceps, illustrations, 45 
tray, 48 
tray, illustration, 48 
Solitary crystals, illustrations of, 207— 
209, 211, 212 
unicellular hairs, 69 
Special research microscope, 14 
illustration, 14 
Specimens, preservation of, 48 
Spermoderm, of celery fruit, 288 
of seeds, 289 
Spigelia marylandica, powdered, il- 
lustration of, 228 
rhizome, cross-section, illustra- 
tion of, 224 
root, cross-section, 
of, 220 
stem, cross-section, illustration 
of, 234 
Spindle fibres, 55 
Spiral vessels, illustrations of, 129, 
130 
Spongy parenchyma of klip buchu, 
260 
Stage micrometer, 19 
illustration, 19 
Staining dish, 40 
illustration, 40 
Standardization of ocular microm- 
eter, 19 
Starch grains, illustrations of, 186, 
187, 189-193 
illustration 
INDEX 
Steinheil lens, 5 
illustration, 5 
Stems, diagnostic structures of, 233 
dicotyledonous, 233 
herbaceous, 233 
monocotyledonous, 233 
Stomata, erating function of, 151 
illustrations of cross-section, 156 
relation to surrounding cells, 
154 
types of, 153 
Stone cells, of ruellia root, 223 
branched, 109 
branched, illustrations of, 110 
description, III, 112 
introduction, 109 : 
occurrence, illustrations, II 
porous and non-striated, I11 
porous and non-striated, illus- 
trations of, 114 
porous and striated, 109 
porous and striated, illustrations 
of, 113 
storage function of, 178 
Storage cavities, 176 
cavities, illustrations of, 177 
cells, 173 
cells, cortical parenchyma, 173 
cells, illustrations of, 174 
cells, pith parenchyma, 173 
cells, wood parenchyma, 173 
tissue, 173 
walls, description of, 179 
Stored mucilage and resin, illustra- 
tions of, 175 
Surrounding cells, arrangement of, 
154 
Synthetic tissue, introduction, 163 
Temporary mounts, 41 
Testa cells, 65 
epidermal cells, illustrations, 64 
Tracheids of pink root, 221 
Trailing arbutus leaf, cross-section, 
illustration of, 266 
Tripod magnifier, 4 
illustration, 4 
Turntable, 46 
illustration, 47 
Under epidermis of klip buchu leaf, 
262 
epidermis of mountain laurel, 
264 
