Just a small portion of the above solution is all that will be necessary, working it under the skin with the finger tip, so as to avoid destroying the features by swelling the tissues. This treatment being a chemical one, it is necessarily slow in its action of bleaching the green color. Should haste be necessary, inject a very small quantity of embalming fluid to arrest the putrefactive process and then cover the spot with theatrical grease of the proper color to match the surrounding skin. =Chemical Action.=—Chemical action is any discoloration of the skin or tissues of the body which may be caused by the action of opposing chemicals. There is only one known discoloration occurring in the body after death as a result of the presence of a chemical in the body, which, when coming in contact with formaldehyde, produces a discoloration. This particular discoloration, greenish in color, is the result of the work of the drug methylene blue in contact with formaldehyde. Often, in cases of chronic malaria, or diseases of the liver, or again as a general antiseptic, methylene blue will be administered by the attending physician, and you should learn this fact beforehand, for if methylene blue has been administered it is advisable not to use a formaldehyde fluid. There is a chemical action set up between the formaldehyde and the methylene blue, which gives the tissues a greenish color, which is quite objectionable. In this case you would use some fluid which does not contain formaldehyde, benzoate of soda, or borax, or peroxide solution should be used. Another good formula to use is the following: Rx Carbolic acid 5 oz. Borax 12 oz. Glycerine 1 oz. Water, sufficient to make 1 gall or Rx Carbolic acid 5 oz. Oxalic acid 12 oz. Boracic acid 2 oz. Water, sufficient to make 1 gall =Postmortem Discoloration.=—This is a general expression, and refers to any discoloration which might occur on the body after death. What is usually meant, though, when this term is used is _the settling of the blood to the dependent parts of the body after death_. If the body is lying on the back, the blood will naturally gravitate toward the back, into the azygos system and cause a bluish discoloration, or the same condition will result, if the body is found lying on the face and stomach, in which case the discoloration will be in the face and the anterior chest and abdominal walls.