File:The microscope and its revelations (1856) (14797970203).jpg

Identifier: microscopeitsrev1856carp (find matches)
Title: The microscope and its revelations
Year: 1856 (1850s)
Authors: Carpenter, William Benjamin, 1813-1885
Subjects: Microscopy Microscopes Microscopy
Publisher: London : John Churchill
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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s contained in the Botanical and Physiological Memoirs, pubhshedby the Ray Society for 1853. Tins excellent observer states that he kept hisplants for observation in httle glass vessels, having the form of a truncatedcone, about two inches deep, and one inch and a quaiter in diameter, with aflat bottom polished on both sides, and filled with water to the depth of fromtwo to three lines. It was only in vessels of this kind, he says, that he wasable to follow the developmeot of a number of various cells thi-oughout itswhole com-se. Probably he would have foimd the glass-tube cells representedin Pig. 65, if he had been acquainted with them, to answer his purpose justas well as these specially constructed vessels. 272 MICROSCOPIC FOUMS OP VEGETABLE LIFE. into a more consistent layer, forming an imperfect primordialutricle; and this is surrounded by a tolerably firm layer,which seems to consist of cellulose or of some modification ofit. Outside this (as shown in Fig. 68, a), when the still
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Various phases of development of Frotococcus pluvialis .—a, anencysted cell, which has passed into the still condition; b, division of a stiir cell into two; c, another mode of division into two, eachprimordial vesicle having developed a cellulose envelope aromid itself,whilst yet within the original cell; n, division of an encysted cellinto four; e, division of an encysted cell into eight; f, division of anencysted cell into thirty-two segments ; &, motile gonidia (zoospores)after then- escape from the original ceU; h, a primordial utricle, with-out ce lulose envelope, fui-nished with two cilia; i, a similar primor-dial utricle, with distinct cellulose envelope, and threads of protoplasmextending towards it; k, an encysted primordial utricle, pointed atboth ends, and fui-nished with two cilia; l, an encysted primordialutricle, of which nearly half is composed of a colom-less granularsubstance, enclosing a red body resembling a nucleus. cell is formed by a change in the condition

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