Chlorinated lime acts exclusively by its chlorine, which, being loosely combined, is disengaged by the slightest affinities. All acids, even the carbonic, disengage it; and as this acid is a product of animal and vegetable decomposition, noxious effluvia furnish the means, to a certain extent, of their own disinfection. But the stronger acids disengage it more freely, and amongst these sulphuric acid is the most convenient. Accordingly, the powder may be dissolved in a very dilute solution of this acid; or a small quantity of the acid may be added to an aqueous solution already formed, if a more copious evolution of chlorine be desired than that which takes place from the mere action of the carbonic acid of the atmosphere.
The great and only objection, so far, against the use of chlorinated lime by the profession, has been the strong smell of the chlorine evolved; but taking into consideration the great antiseptic properties, and also the strong bleaching and disinfecting qualities of the chlorine, we find that it cannot be overlooked as an agent of major importance in the preservation of bodies.
There are certain modes of using the chlorinated lime whereby the offensive odor can be to a great extent diminished, if not altogether done away with. When used in its crude state, it will be found difficult to handle; besides, it could not be used for the purpose of an injection; it needs, then, a certain amount of preparation before it be used in a liquid form. The following has been given as the simplest manner of preparing it for injecting:
Take, of chlorinated lime, one pound, carbonate of soda, two pounds, water, one gallon; dissolve the carbonate of soda in three pints of water by the aid of heat; to the remainder of the water add, by small portions at a time, the chlorinated lime, previously well triturated, stirring the mixture after each addition. Set the mixture by for several hours, that the dregs may subside; then decant the clear liquor, and mix it with the solution of carbonate of soda. Lastly, decant the clear liquor from the precipitated carbonate of lime, pass it through a linen cloth, and keep it in bottles secluded from the light.
The London Pharmacopœia gives a still better process for preparing it, for reasons which will be given hereafter:
Take, of carbonate of soda, one pound, water, forty-eight fluid ounces, chloride of sodium (common salt), four ounces, black oxide of manganese, three ounces, sulphuric acid, two fluid ounces and a half; dissolve the carbonate of soda in two pints of water; then put the chloride of sodium and the binoxide or black oxide of manganese, rubbed to powder, in a retort, and add to them the acid, previously mixed with three fluid ounces of water, and cooled. Heat the mixture, and pass the chlorine first through five fluid ounces of water, and afterwards into the solution of the carbonate above directed. Upon the addition of muriatic acid, both these solutions emit carbonic acid and chlorine together.
The foregoing given preparation will be found to answer the purpose for disinfecting, injecting and preserving corpses. For injecting purposes, the solution should be used fresh, and the muriatic acid only added to it, for a more copious liberation of both carbonic acid and chlorine, when ready to inject the liquid, as the antiseptic properties of the solution depend altogether on its gaseous evolutions.
To inject the solution, it will be found that the axillary artery on the left side is a good point; also, the right jugular vein should be punctured, so as to facilitate the flow of blood from the head. But to make the operation complete, and to be sure of a perfect and thorough injection, the ascending aorta should be injected, and the inferior vena cava severed at a corresponding point. This mode of injecting has been described in a former chapter.
It is not possible to specify here the amount of liquid to be injected; but as a general rule there should be enough of the solution injected to fill the circulatory system, and the injection be continued until after the blood has ceased to flow from the wound in the vena cava and the injecting fluid appears in its place.
When injected with this solution, a corpse may present for a few hours afterwards a bloated and swollen appearance, and the face and body may be marbled over with white spots; but these symptoms will soon disappear, the body will collapse again to its normal size, and the color become of a uniform shade.