PRESERVATIVES
(See also Foods.)
Preservative Fluid For Museums.—
| Formaldehyde solution | 6 parts |
| Glycerine | 12 parts |
| Alcohol | 3 parts |
| Water | 100 parts |
The addition of glycerine becomes necessary only if it is desired to keep the pieces in a soft state. Filtering through animal charcoal renders the liquid perfectly colorless. For dense objects, such as lungs and liver, it is best to make incisions so as to facilitate the penetration of the fluid. In the case of very thick pieces, it is best to take 80 to 100 parts of formaldehyde solution for above quantities.
Preservative For Stone, Etc.
Preservative For Stuffed Animals.
| Arsenic | 0.7 parts |
| Alum | 15.0 parts |
| Water | 100.0 parts |
For sprinkling the inside skin as well as filling bones, the following is employed:
| Camphor | 2 parts |
| Insect powder | 2 parts |
| Black pepper | 1 part |
| Flowers of sulphur | 4 parts |
| Alum | 3 parts |
| Calcined soda | 3 parts |
| Tobacco powder | 3 parts |
Preservatives For Zoological And Anatomical Specimens.
| Sodium fluoride | 5 parts |
| Formaldehyde (40 per cent) | 2 parts |
| Water | 100 parts |
After leaving this fixing liquid they are put in the following preservative solution:
| Glycerine (28° Bé.) | 5 parts |
| Water | 10 parts |
| Magnesium chloride | 1 part |
| Sodium fluoride | 0.2 parts |
In this liquid zoological preparations, especially reptiles, retain their natural coloring. Most anatomical preparations likewise remain unchanged therein.
PRESERVATIVES FOR WOOD: See Wood.