ences, at his residence, on November 16th, and made special and elaborate preparations for the occasion by electric illumination of the dining-hall in a way to produce some novel and agreeable effects. It is supposed that the anxiety and exertion of this preparation were more than he could well endure. He was attacked with severe pains in the chest, and suffered much while at dinner, but thought that he would get relief by a warm bath. But, instead of relief, his symptoms were aggravated, and a physician was sent for who recognized his attack as one of violent double pneumonia and pleurisy. It was hoped, however, that he might recover until shortly before his death, which occurred early in the morning on the 20th of November.
Henry Draper was born in Prince Edward County, Virginia, March 7, 1837, and two years later his father, Dr. John William Draper, removed to this city to take the chair of Chemistry in the New York University. Henry, at first, went through the course at the public school, but at the age of fifteen he entered the Academic Department of the university, though he did not graduate there. At the end of his sophomore year he entered the Medical Department of the university, which his father had been prominent in establishing, and from which he took his medical degree in 1858. He at first thought of practicing medicine, and received an appointment upon the medical staff of Bellevue Hospital, which he held for sixteen months, and then decided to abandon practice, and give himself to teaching. He was elected Professor of Physiology in the Academical Department of the university in 1860, and in 1866 became professor of the same branch in the University Medical School. He resigned this post in 1873, and afterward taught advanced analytical chemistry in the Academical Department of the institution. After the death of his father he was appointed to fill his chair, but previous to the opening of the last fall term he severed entirely his connection with the institution.
Professor Henry Draper is one of the men who is not to be interpreted in his individuality alone. With his father he represents one of the double stars in the firmament of scientific celebrities of which we have now a considerable catalogue. Among the illustrious pioneers of mathematical physics there are the Bernoullis, father and son; in chemistry, the Gmelins and the Brodies; in botany, the De Candolles and the Hookers; and, in astronomy, the Cassinis and the Herschels; and to these must be added the Drapers, father and son. Many more examples, though less eminent, might be given in which sons have distinguished themselves by pursuing with success the branches of research opened by their fathers, and to trace the influence that is exerted and the effects that are produced in these cases would be an interesting biographical study. In the present instance the son was the inheritor both of his father's genius and of his subjects of research, while his early education was shaped with a view to the pursuits to which his life was devoted. This point is thus referred to in the