A Simplified and Convenient Method for the Double-Embedding of Tissues

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Abstract
A method for embedding tissues with a celloidin-paraffin combination is presented. The essential features of the process depend upon (1) a thorough infiltration of the specimen with celloidin of low concentration, and (2) the subsequent impregnation of both the specimen and the celloidin with paraffin. The methods for sectioning, and the removal of the embedding agent are given. The chief advantages of this method are: the preservation of all of the advantages of celloidin embedding but with a great saving of time, and greater convenience of storage; the cutting of thin sections (2μ for many types of tissues); it is useful for embedding specimens for which neither pure paraffin nor pure celloidin are entirely satisfactory, i.e. those containing tissues differing in density.

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