. The microscope; a simple handbook. Microscopes. THE MICROSCOPE AS A RECREATION 129 colonies of such Monads, as they are called, are to be found on weeds, ceaselessly lashing the water with their flagella, causing a cxirrent which brings particles of food withia their Fia. 120.— Monad. Fig. 121.—CoUarerl Monad, Fig. 122.—Collared Monad in Shells,. A further elaboration of this cell wall is found in the Collared Monads, which are possessed of a transparent cup made from an extension of the hardened margin of their body. In the centre of this the flagellum vibrates, bringing a steady fl
. The microscope; a simple handbook. Microscopes. THE MICROSCOPE AS A RECREATION 129 colonies of such Monads, as they are called, are to be found on weeds, ceaselessly lashing the water with their flagella, causing a cxirrent which brings particles of food withia their Fia. 120.— Monad. Fig. 121.—CoUarerl Monad, Fig. 122.—Collared Monad in Shells,. A further elaboration of this cell wall is found in the Collared Monads, which are possessed of a transparent cup made from an extension of the hardened margin of their body. In the centre of this the flagellum vibrates, bringing a steady flow of water into this''^cup or collar. This is the simplest form, but in a more complicated one these Collared Monads have provided themselves with transparent shells of most elegant forms, to'the bottom of which they anchor themselves. They retreat right into them forTprotection from danger, but are found extended when engaged in finding their food. Thus a series of creatures are met with which possess a shell of the same simple type, consisting of nothing but a piece of jelly with a nucleus and a bubble, but showing great diversity ofJform as regards the struc- ture of the wall of the cell in which the jelly is contained. The development of a single Flagellum has been traced, but now we come to the CiUata, which have rows of hairs. If we imagine the soft, jelly-like exudations of the Heliozoa to be hardened and given a vibratile motion, we have the simplest form of Ciliate, just a tiny ball with rapidly vibrating hairs all over it, these giving it a con- tinuously rolling movement. Myriads of such creatures in difierent forms exist, some brilliantly coloured, some perfectly Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Beck, Conrad, 1864-. London, R. & J. Beck, Ltd.
Size: 2457px × 1017px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectmicroscopes, bookyear
