Icy cold, cold subjectively and objectively. The blood seems to have receded from the surface, especially the extremities. It is like the collapse of cholera. The nose is stopped, dry and pointed. The head aches in the frontal sinuses, even throbs. Now seat yourself by the fire, and take a drop on sugar, every five minutes, of common spirits of Camphor until reaction sets in, and there is an end of that cold. It is especially efficacious after a ride in the cold air, until thoroughly chilled through, even prostrated by the cold. Anyone who understands the principles of Homoeopathy can see how Camphor is here the remedy. But it is in the very first stage of a cold that it is to be used. After reaction sets in, Aconite or some other remedy will be indicated.