Manual for the physiological laboratory / by Vincent Dormer Harris and D'Arcy Power.

  • Harris, Vincent Dormer.
Date:
1888
Catalogue details

Licence: Public Domain Mark

Credit: Manual for the physiological laboratory / by Vincent Dormer Harris and D'Arcy Power. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    be obtained ; and, by niixint,' in v:ui(/ns propoiti< iis, will supply wax of required melting-points for the different seasons of the year, witliout further admixture of lard. Spermaceti and Castor Oil. -Take four ])arts of sper- maceti and one ])art of castor oil. Cacao butter may be used alone or combined with paraffin, wax, and oil, or with spermaceti and parathii. To melt the Wax Mass.—Tiie wax mass is melted in a small porcelain capsule provided Avith a handle, over the flame of a Bunseu's burner or spirit-lamp. Care must be taken that the material is not burnt. It is usual in laboratories to place the capsule on a piece of fine iron gauze on a tripod, and to place a gas flame from a Bunsen's burner of the smallest size beneath it : a glass rod may be used as a stirrer. To embed the Specimen in Wax Mass for Cutting.—A piece of stout pa})er is taken, six inches long and three broad. This Fig'. 11.—Paper Box for Embedding. is doubled into three longitudinal folds ; after this from each end folds of two inches long are marked off. The paper is then opened out, and of the three longitudinal folds the middle one forms the bottom and the lateral ones the sides of the paper box. The ends are made from the middle part of the end folds. The ends of each flap are marked off into two equal squares, ]•: c, c D, E^ c\ ('^ 1)1. The squares e b a c and e' ij^ a^ c^ are doubled into two parts across the diameters A B, A^ h\ and these triangular folds thus made are pinched up and pressed against the end of the box to support it ; they are retained in position by the remainder of the end fold represented by a a^ d d^ being turned back over them. Having made a paper box in the manner above described, and having melted the wax mass, take the specimen to be embedded
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