When the attack comes on suddenly after an exposure to a cold, dry wind, with chilliness, followed by fever, Aconite will be the remedy. It suits colds which be- gin with coughing. It should be administered just as soon as the patient realizes that he has taken cold. There is as yet no discharge, but from the congestion the nose is swollen, hot, dry and stopped up, and this stoppage is apt to change from side to side ; there is tingling and burning in the nose and a throbbing frontal headache; there may be sneezing also. These symptoms are all better in the open air. Nux vomica has colds caused by cold weather, with a dry, stuffed up nose and rough, scrapy throat. In Belladonna there is more cerebral excitement and swell- ing in the throat is a prominent symptom.