Ili^DEX. 



513 



Plants, 



hydrocharis, 376 



grouudael, 378 



valUsneria spiralis, 379 



penstemon, 378 



aquatic, to cultivate, 380 

 Pliny, 1 

 Pocket microscope, iS 



Powell's, 

 Podura, scales of, 435 

 Point, needle, 364 

 Portable microscope, 



Smith, 54 



Ross, 55 



compound achromatic micro- 

 scope, Powell, 74 



ditto, Eoss, 81 



lamp, 155 

 Polarization of light, 236 



origin of term, 236 



apparatus for, 238 



mode of using ditto, 239 



advantages of, 260 



cause of colours of, 245 



Legg, Mr., experiments of, 241 



Darker, Mr., apparatus of, 249 



objects for, 448 - 

 Polarizing apparatus, 120 



ciystals, 503 

 Polyps, troughs for, 140 

 Position of microscope, 181 

 Powell, H., 



improvements in microscopes, 42 

 Powell and Lealand, 



compound achromatic micro- 

 scope, 74, 77, 78 



ditto ditto, large, 80 



dissecting microscope, 52 



achromatic condenser, 113 

 Powers, magnifying, 158 

 Preliminary directions, 181 

 Preparations, animal, list of, 411 

 Preservative fluids, 278 



spirit and water, 278 



acetate of alumina, 278 



creosote solution, 279 



Mr. Thwaites's, 279 



glycerine, 280 



Goadby's, 278 



chromic acid, 280 



salt and water, 280 



naphtha, 281 



method of using, 281 

 Prism, Dujardin'B, 118 



achromatic, 119 



JTacheffe oblique, 119 

 Pritchard, A., 



jewel lenses of, 26 



works of, 44 

 Ptolemy, 2 



33 



QUEKETT, E". J., 



' forceps, 136 

 flat cells, 284 



method of mounting opaque ob- 

 jects in pill boxes, 323 

 forceps for ditto, 324 



R 



Eainey's Cells, 298 



Eamsden, 



eyepiece of, 73, 176 



Eaphides, 402 



Raspail, 63 



Reading-lamp, 149 



Re-agent, 184 



Record, 2 



Redi, Dr. Francis, 2 



Reflector, side, 127 



Rests, for dissecting, 351, 354 



Ross, Andrew, 



first microscope of, 40 

 object-glass of, 41 

 improvement in ditto, 41 

 compound microscope, 81 

 ditto, ditto, portable, 84 

 dissecting imcroscope, portable, 



55 _ 

 single microscope, 58 

 achromatic condenser, 113 

 correction of object-glass, 170 

 goniometer, 256 



Ross, Mr. Thomas, 



machine for cutting thin glass, 

 269 



Rotifers, 



to procure, 394 



Rush, Dutch, 



to prepare, 333 



Salts, 



crystallization of, 449 

 Salvetti, 



. / microscope of, 6 

 Scales, 



of Amathusia Horsfieldii, 602 



of fish, 429 



of Hipparchia janira, 469 



of insects, 423 



of Pontia brassica, 470 



of Polyommatus argiolus, 470 



of Podura, 470 



of Lepisma, 472 



Gnat's wing, 472 



Menelaus, 473 

 Scalpels, 346 



