2. In the _time of the eruption_, from the beginning of the fever. It generally appeared on the third and fourth days. In one case, Dr. Waters informed me, it did not appear till the eighth day. 3. In the _abatement_ or _continuance_ of the fever after the eruption. 4. In the _colour_ and _figure_ of the eruption. In some it put on a _pale_ red, in others a _deep_, and in a few a _livid_ colour, resembling an incipient mortification. In some there appeared red blotches, in others an equally diffused redness, and in a few, eruptions like the small-pox, called by Dr. Cullen, rubiola varioloides. 5. In the _duration_ of the eruption on the skin. It remained in most cases only three or four days; but in one, which came under my care, it remained nine days. 6. In the _manner of its retrocession_. I saw very few cases of its leaving the branny appearance so generally spoken of by authors on the skin. 7. In _not affecting_ many persons, and even families who were exposed to it. The symptoms which continued in many after the retrocession of the measles, were cough, hoarseness, or complete aphonia, which continued in two cases for two weeks; also diarrh[oe]a, opthalmy, a bad taste in the mouth, a defect or excess of appetite, and a fever, which in some instances was of the intermitting kind, but which in more assumed the more dangerous form of the typhus mitior. Two cases of internal dropsy of the brain followed them. One was evidently excited by a fall. They both ended fatally. During the prevalence of the disease I observed several persons (who had had the measles, and who were closely confined to the rooms of persons ill with them) to be affected with a slight cough, sore throat, and even sores in the mouth. I find a similar fact taken notice of by Dr. Quier. But I observed further, many children to be affected by a fever, cough, and all the other symptoms of the measles which have been mentioned, except a general eruption, for in some there was a trifling efflorescence about the neck and breast. I observed the same thing in 1773 and 1783. In my note book I find the following account of the appearance of this disease in children in the year 1773. "The measles appeared in March; a catarrh (for by that name I then called it) appeared at the same time, and was often mistaken for them, the symptoms being nearly the same in both. In the catarrh there was in some instances a trifling eruption. A lax often attended it, and some who had it had an extremely sore mouth."