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2 resemble in every respect the freshly prepared fibres. The specimens for mounting are selected to show the variations in [[insertion]] the [[/insertion]] size of the fibres, and the forms of their ends. They are then placed in the mounting medium which may be water without any addition, which is the [[strikethrough]] best ger [[/strikethrough]] medium most generally appropriate, or a mixture of water and glycerin in equal parts, which is to be recommended for the coarser & more opaque varieties. The glass [[slides?]] are prepared in advance by running upon them a thin ring of clear shellac in alcohol, just large enough to receive the cover-glass. This is done on a turn-table, in the usual way. When this ring is thoroughly dry the mounting may be proceeded with. First put the slide again on the turn-table and run a fresh coat of [[strikethrough]] this [[/strikethrough]] shellac over the ring. Then immediately, or after a couple of minutes, put [[strikethrough]] on [[/strikethrough]] a large drop of the mounting fluid into the cell, transfer to it the specimen selected for mounting, which must be already permeated with the fluid, apply the cover-glass, & press out the superfluous fluid. Press down the cover until the edge comes in contact [[insertion]] all around [[/insertion]] with the