We have found, by experience, that the great secret of success in anatomical injections, consists in first heating the part, or subject, thoroughly in hot water, the temperature of which, for an entire subject must be continued for ten or twelve hours, or until the deepest parts are equally heated; secondly, to take the precaution to reduce the colouring matters to an impalpable powder, and use the injection at as high a temperature as possible without injury to the tissues.
Formulæ for coarse Injections.
| Red.—Yellow bees-wax, | 16 ℥. |
| Red.—White resin, | 9 ℥. |
| Red.—Turpentine varnish, | 6 ℥. |
| Red.—Vermilion, or carmine, | 3 ℥. |
| Yellow.—The same materials, substituting for the red colouring matter, King’s yellow, | 2 1/2 ℥. |
| Black.—Substituting lamp-black, | 1 ℥. |
| Green.—Substituting crystallized verdigris, | 4 1/2 ℥. |
| Green.—Best flake white, | 1 1/2 ℥. |
| Green.—Gamboge, | 1 ℥. |
| White.—Substituting fine white bees-wax, and best flake white, | 5 1/2 ℥. |
| Pale blue.—The same, substituting fine blue smalt, | 3 1/2 ℥. |
| Dark blue.—Substituting blue verditer, | 10 1/2 ℥. |
First liquify the wax, resin, and turpentine varnish, over a slow fire, in an earthen pot, then add the colouring matter, previously mixing it in another pot, with a very small quantity of the liquified composition, and stirring it well with a wooden pestle, so that the colouring ingredients may be intimately and smoothly blended; then add, by degrees, the whole of the ingredients, and when they have acquired their due heat, by being placed again over the fire, the injection will be ready for immediate use. A quantity of the ingredients of these injections may be kept prepared without the colouring matters, which may be added in their proper proportions, pro re nata. The ingredients become brittle by frequent melting, and turpentine varnish must be occasionally added. The same rules apply to the mixture of the following: