INDEX 



241 



Objectives, parfocal, 48 



■ — , sectional views of, *35 



— , working distance of, 38, 230 



Ocular micrometer, 214 



Oculars, *42 



■ — , construction of, 38 



— , indication, of power, 38 



Oils, 65, 148 



Ontogeny, 191 



Open collateral bundles, *128, 



129 

 Optic axis, 26, *28, *29, *34 

 Optics of compound microscope, 

 *34 



simple microscope, *29, 31 



Optical parts of microscope, 35, 



*42 

 Ordinary ray, 220 

 Orientation, 6 

 Origin of cells and tissues, 74 



Palisade tissue of leaf, *185, 

 *186, 187 



seed, *210, 211 



Papillae, 94, *96 



— of stigma, *193, 195 

 Papillose hairs, 99 

 Paraffin infiltration, 2 



— molds, 6, *6 

 Parallel prisms, 220 

 Parasitic plants, 114 

 Parenchyma, 84 



— , cortical, *78, 79, 140, 160 



— of bark, *172, *173, 176 



fruit, 199, *200, *203, *204 



leaf, *185, *186, 188 



root, *153, 154, "159, 160 



seed, *208, 209, *210, 211 



wood, 178, *180, *181, 182 



— ,pith, *78, 80, 84, *153, 157, 



*159,-*165, 168, 182 



Parenchyma, porous, *125, 127 



Parfocal objectives, 48 



Parts of compound microscope, 



33, 42 

 Pectins, 59 

 — , reactions for, 60 

 — , stains for, 69 

 Perforated parenchyma, "125, 



127 

 Periblem, 77, *78 

 Pericarp, 198 

 Periderm, 101, *172, *173 

 Perisperm, 206 



Permanent mounting media, 21 

 Permanent root tissues. 80, 158 

 Petals, 194 

 Phelloderm, 81, *82, 160, 171, 



*172, *173 

 Phellogen, 81, *8Z, 160, 171, 



*172, *173 

 Phenylhydrazine solution, 228 

 Phloem bundles, *78, 80, 127 



— elements in barks, *172, *173, 



176 

 Phlorglucin solution, 228 

 Photosynthesis, 132 

 Picric acid solution, 2, 228 



, Altman's, 225 



Pillar of microscope, *42, 43 

 Pistil tissues, 195 

 Pith, 80, 84 



— in woods, 182 



— of stem, 84, *165 



— parenchyma, 80, 84, 127, 140, 



*153, 157, *159, *165 

 Pitted ducts, 121, "123 

 Planoconcave lens, 25, *26 

 Planoconvex lens, 25, *26 

 Plant cells, 70, *71 

 Plant hairs, 92, *96, *97, *98, 



*100 

 , classification, 94 



