THE MICROTOMIST' S VADE-MECUM

" Schultze recommends it for preserving Medusce, Echino.-
dermata, Annelid larvae, Entonostraca, Polythalania, and
Polycystina, and advises the use of glycerin afterwards to
produce transparence."
314. Salt and Corrosive Sublimate (Goadby's third fluidl).
When carbonate of lime exists in the preparations, the
alum must be omitted. The following formula is recom-
mended:
Bay salt       .    .    .     .    .   8 ounces.
Corrosive sublimate      .     .    .   2 grains.
Water .       .    .     .    .     .   1 quart.
315. Salt and Corrosive Sublimate (Goadby's fourth fluid 2).
" Marine animals require a stronger fluid of this kind,
made by adding about 2 ounces more salt to the last."
316. Salt and Corrosive Sublimate (Pacisi's fluid, No. 2 3).
Bichloride of mercury     .    .     .    1 part.
Common salt.        .    .     .    .     2
Water . . . . . . 200 ,,
Of general employment, but especially useful for blood-
corpuscles of cold-blooded animals, as it has a less density
than the following fluid.      It preserves spermatic fluid,
epithelia, nerves, and muscle fibres. It is also used for
fixing Infusoria, a small quantity being added to the water
containing them.
317. Salt and Corrosive Sublimate (Pacini's fluid, No. 3 4).
Bichloride of mercury     .    .     .    1 part.
Common salt .       .     .    .     .    4
Water     .    .    .     .    .     .  200
I Ibid.                         2 Ibid.
3 Journ. de Mic.,' iv (1880). 'Journ. Roy. Mic. Soc.' (N.S.), ii (1882),
p.702.
Note.-Pacini's fluid, No. 1, is identical with tilat of Harting given
above, viz. 1*200 sublimate in water. Pacini uses it for removing, when
desired, the salt or acid from preparations that have been placed in one
of the other solutions.
I Ibid.

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