Archive image from page 153 of Cytological technique; the principles underlying. Cytological technique; the principles underlying routine methods cytologicaltechn00bake Year: 1960 134 CYTOLOGICAL TECHNIQUE section mounting medium covers lip slide adhesive attactiing section to slide Fig. 7. Diagram of a finished microscopical slide in sectional view, showing adhesives and varnish. secondly, the oxidation by atmospheric oxygen of the Hnoleic and other unsaturated fatty acids contained in the linseed oil. This oxidation is helped by heating the oil with lead monoxide in the preparation of t
Archive image from page 153 of Cytological technique; the principles underlying. Cytological technique; the principles underlying routine methods cytologicaltechn00bake Year: 1960 134 CYTOLOGICAL TECHNIQUE section mounting medium covers lip slide adhesive attactiing section to slide Fig. 7. Diagram of a finished microscopical slide in sectional view, showing adhesives and varnish. secondly, the oxidation by atmospheric oxygen of the Hnoleic and other unsaturated fatty acids contained in the linseed oil. This oxidation is helped by heating the oil with lead monoxide in the preparation of the varnish. The hardening occupies some days after the varnish has been applied. All finished microscopical preparations of organisms and their parts, other than those of living cells still lying in the fluid that bathed them in their natural environment, are to be regarded as products of the reaction between the living tissues and the various media in which they have successively been soaked. The reaction- products, which are what we study under the microscope, are only informative about organisms and their life-processes if some knowledge is available about the reactions involved; and this presupposes knowledge of the reagents. It has been the purpose of this book to supply information about the reagents that are used in some of the simplest processes of routine microtechnique, and about their reactions with tissue-constituents. If an unknown tissue or cell be acted upon by an unknown re- agent, no useful information can be obtained. Cytologists and histologists should be as loath to use secret reagents as doctors are to use secret medicines. Quite a lot of fancifully named embed-
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