The Microscope: Its History, Construction and Application

achromatic acid algæ angle angular aperture animal animalcules Annelids aperture appearance arrangement attached axis beautiful become body calcareous Canada balsam cavity cells centre cilia circular colour composed condenser consists covered crystals delicate deposited diameter Diatoms disc edge eggs epithelium examination exhibit eye-piece fibres filaments fluid focus Foraminifera gemmules glass hairs Haversian canals horny illumination inch Infusoria insect instrument lacunæ larvæ layer lens lenses lines magnifying power mass matter membrane ment micro microscope microscopist minute motion mounted muscular nucleolus nucleus object object-glass oblique observed obtained opaque organs outer peculiar piece placed plants Plate polarised light polype portion present prism produced rays refraction resembling round scales screw seen shell side siliceous slide solution species specimens spicula spiral sponge spores stage structure substance surface teeth tentacles thickness thin tion tissue tourmaline transparent transverse tube vegetable vessels Volvox Vorticella zoospores