242 



INDEX 



Plant proteins, 64, 135, 150 



— respiration, 117 



— tissues, 70 



, reactions for, 57 



Plastids, 72 

 Plerom, 77, *78 

 Polar caps, *75, 76 

 Polarization, 219 

 Polarized light, 219 

 Polarizer, 220 

 Pollen, *193, 194 

 Porous fibers, 105, *106, *107, 

 108 



— parenchyma, *125, 127 



— stone cells, *109, 110 

 Primary cortex, *78, 79, 154 



— epidermis, *78, 79, 152 



— medullary rays, 80, *82 



— periderm, 81, *82 



— root tissues, 77, *78, 151 



— stem structures, 83, 163, *165 

 Principal axis, 26, *27, *28, *29 



— focus, 26, *27, *28, *29 

 Prismatic crystals, 146, *149 

 Prisms, nicol, 220 

 Process, clearing, 4 



— , dehydrating, 3 

 — , embedding, 6 

 — , fixing, 2 

 — , infiltration, 5 



Production of real images, 27, 

 *28 



virtual images, 28, *29 



Prosenchyma, 84 

 Protective tissues, 87 

 Protoplasm, 71 



Protoplasmic contents, 71, *71 

 Pyrogallol solution, 228 



E 

 Eadial bundles, 129, *130 



— section, 7 



Eaphides, 146, *149 



Eays, 80, 124, 161, 179, *180, 



*181 

 — , functions of, 124 

 Eeactions for aleurone, 64 



alkaloids, 62 



calcium carbonate, 65 



oxalate, 63 



cellulose, 58 



cutin, 59 



fats, 65 



glucosides, 63 



gums, 60 



inulin, 61 



lignin, 58 



pectins, 60 



■ resins, 64 



silica, 65 



starch, 61 



suberin, 59 



sugars, 62 



tannin, 64 



Eeal images, 27 



, formation of, 27, *28 



Eeference books, 232 

 Eefraction, 19, 24, *25 



— in concave lenses, 27, *27 



convex lenses, 27, *27 



Eegulation of transpiration, 118 

 Eemoval of embedding media, 14 

 Eeserve cellulose, 112, 141 



— starch, 134, 143 

 Eesins, 64, 148 

 Eesolving power, 38 

 Eespiration in plants, 117 

 Eeticulate ducts, 121, *123 

 Eetina, 24 



Ehizomes, 183 



Eibbon carrier, 13, *13 



— sections, 13 

 Boot bark, 158, *172 



— bundles, *78, *82, 156 



