According to some observers, turpentine is said to be of no value; but this failure in the use of turpentine has been shown to be due to the employment of different varieties of oil. The crude acid French oil, of the three kinds met with in commerce, appears to be the only one that acts as described below. With turpentine, phosphorus forms a spermaceti-like mass consisting of _turpentine phosphorus acid_. It has an acid reaction, and is converted, on exposure to the air, into a resinous substance smelling like pine-resin. With earths and metallic oxides it forms insoluble salts. The acid is not poisonous; doses of 0.03 to 0.3 gram may be given to dogs and rabbits without any other effect than that of lowering of the body temperature. To the formation of this compound, the antidotal properties of turpentine in phosphorus poisoning are attributed (_Kohler a. Schempf Dingl._, pol. Jcxcix.). Turpentine is said by some to be valueless if not given within twelve hours. Emetics of sulphate of copper may be administered, but the salt is liable to cause severe gastro-enteritis. Further treatment may consist of mucilaginous drinks containing magnesia and opium to relieve pain. Oils or fats should not be given because of their solvent action upon phosphorus. =Synopsis of the Effects due to Poisoning by Phosphorus= 1. Which variety of phosphorus is poisonous?--The ordinary yellow phosphorus usually kept in water. The allotropic form is inert. 2. What quantity is sufficient to kill an adult?--One grain and a half. 3. Symptoms as regards-- (1) _Alimentary Canal._--Pain in the stomach and belly, eructation of gas smelling like garlic, vomiting, and sometimes purging, with other signs of irritation. (2) _Circulatory System._--Tendency to hæmorrhage from the mouth, stomach, lungs, bladder, &c. Petechiæ and ecchymoses may occur on all parts of the body. If the case be prolonged, anæmia may be present. Pulse small, weak, and scarcely perceptible. (3) _Nervous System._--Cramps, creeping sensations in the limbs, delirium, convulsions, paralysis, and extreme nervous prostration. (4) _Period of Invasion of the Symptoms._--Obscure and insidious; some hours or even days may elapse before the appearance of the symptoms. (5) _Period of Fatal Termination._--In some cases as short as four hours. 4. _Post-mortem_ Appearances-- (1) _Alimentary Canal._--Signs of irritation and inflammation in the stomach and intestines. Gangrene and perforation have been noticed. Strong smell of garlic when the abdomen is laid open. Appearances not unlike scurvy may be found. (2) _Cellular Tissue._--Ecchymoses may be present in the cellular tissue of the abdomen, chest, and other parts of the body.