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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