Maine general hospital, of which he has been attending physician since its opening in 1875. In 1860-'1 he was professor of materia medica, and in 1861-'9 of the theory and practice of medicine in the Medical school of Maine, connected with Bowdoin college. This chair he resumed in 1880. He has contributed to professional literature papers on the use of the stethoscope in determining the position of the foetus in utero, on abortion, and on defective drainage and sewerage, and has published various addresses. He also prepared the articles on “Dropsy” and “Inflammation of the Intestines” in Wood's “Reference Hand-Book of the Medical Sciences.” Sisters of Dr. Dana married Seth Ames, Jacob Abbott, and William R. Lawrence. Israel Thorndike was his uncle. — Samuel, nephew of Joseph, clergyman, b. in Cambridge (now Brighton), Mass., 14 Jan., 1739; d. in Amherst, N. H., 1 April, 1798, was graduated at Harvard in 1755, having among his classmates John Adams and Tristram Dalton, after which he studied theology. In 1761 the town of Groton invited him to become their minister “with a settlement of £200, a salary of £80, and firewood not to exceed thirty cords per annum.” He accepted this call, and was installed on 3 June as successor to Caleb Trowbridge. During the troubles that preceded the Revolutionary war, believing that resistance would lead to greater evils than were then endured, he used his influence on the side of non-resistance. This course gave great offence to his parishioners, who prevented him from entering the meeting-house, although the whig committee of Groton published a card to the effect that Mr. Dana had fully atoned for his offences. The good will of his people had become alienated, and his dismissal soon followed. He continued to reside in Groton, where he cultivated a small farm, and in 1780 preached to a separate society. On the death of John Bulkeley, he became executor of his will, and, removing the extensive law library to his own residence, he studied for that profession. Subsequently he was admitted to the bar and practised in Amherst, N. H., where in 1787 he was made judge of probate for Hillsborough county, and in 1793 was state senator. — His son, Samuel, lawyer, b. in Groton, Mass., 26 June, 1767; d. in Charlestown, 20 Nov., 1825. He studied law, and became prominent in that profession in Charlestown, where he and Timothy Bigelow were professional and political rivals, Mr. Dana being a Jeffersonian democrat, and Mr. Bigelow a federalist. In his speeches at the bar he was smooth, gentle, and insinuating, as Mr. Bigelow was bold, rapid, and vehement. He filled various local offices, was a member of the Massachusetts senate, and its president for eight years, and served in congress from 22 Sept., 1814, till 3 March, 1815. Subsequently he received the appointment of chief justice of the circuit court of common pleas. — James Freeman, nephew of Samuel and grandson of Samuel, chemist, b. in Amherst, N. H., 23 Sept., 1793; d. in New York city, 14 April, 1827. He was graduated at Harvard in 1813, and at the medical department in 1817. He studied with Dr. John Gorham, and developed such ability that in 1815 he was selected by the authorities of Harvard to procure for the chemical laboratory a new outfit of apparatus. For this purpose he visited London, where for six months he worked in the laboratory of Friedrich Christian Accum. On his return to the United States he settled in Cambridge, where he practised medicine and was appointed assistant to the chair in chemistry. In 1817 he was invited to lecture on chemistry at Dartmouth, and in 1820 became the first professor of chemistry and mineralogy in that institution. He was chosen professor of chemistry in the College of physicians and surgeons in New York in 1825, and continued as such until his death. While a student in Cambridge, he received the Boylston prize for a dissertation on the “Tests for Arsenic,” and again in 1817 received the same prize for an essay on the “Composition of Oxymuriatic Acid.” He contributed numerous scientific memoirs to Silliman's “American Journal of Science” and to the “Annals of the New York Lyceum of Natural History.” His larger works are, with his brother, “Outlines of Mineralogy and Geology of Boston and its Vicinity” (Boston, 1818), and “Epitome of Chemical Philosophy” (Concord, N. H., 1825). — His brother, Samuel Luther, chemist, b. in Amherst, N. H., 11 July, 1795; d. in Lowell, Mass., 11 March, 1868. He studied at Phillips Exeter academy, and was graduated at Harvard in 1813. Desirous of becoming a military engineer, he applied for an appointment to the U. S. military academy, but instead was commissioned a lieutenant in the 1st artillery. He served during the war in New York and Virginia, and at its close resigned from the army. Subsequently he studied medicine, and was graduated at Harvard medical school in 1818. From 1819 till 1826 he practised in Waltham, Mass., where he was brought into intimate relations with the early cotton manufacturers of the state, and his fondness for physical science determined him to devote his attention to chemistry as applied to the manufacture and coloring of cotton goods. About 1826 he established a laboratory in Waltham for the manufacture of sulphuric acid and bleaching-salts, which afterward was merged in the Newton chemical company, and he was its chemist until 1834. In 1833 he visited Europe, and spent some time in England prosecuting chemical investigations. On his return he removed to Lowell, where he became resident and consulting chemist to the Merrimack manufacturing company, and continued as such until his death. His investigation in the bleaching of cotton led to the invention of the so-called “American system” of bleaching, which attracted much attention abroad when first published in 1838 in the “Bulletin de la société industrielle de Mulhouse.” Many other important improvements in the printing of cottons and the chemical processes involved in that work were made by him, and gave to the goods produced in Lowell a high reputation in the United States. His researches on the action of cow-manure as a mordant, showing that its fixing properties are due to the sodium phosphate that it contains, with the subsequent introduction of “substitutes,” was a decided advance in the art of calico-printing. Dr. Dana prepared for the city of Lowell a valuable report on the injurious influence of lead pipes for water used for drinking and culinary purposes. His interest in this subject led him subsequently to translate from the French a “Treatise on Lead Diseases.” He contributed many papers on technical topics to the “North American Review” and Silliman's “American Journal of Science,” and, in conjunction with his brother, James Freeman Dana, he published “Outlines of Mineralogy and Geology of Boston and its Vicinity” (Boston, 1818). His other works include “Chemical Changes occurring in the Manufacture of Sulphuric Acid” (1833), and his investigations in chemistry applied to agriculture led to the publication of “Muck Manual for Manures” (Lowell, 1842), for which he received a prize from the Massachusetts society for promoting agriculture, and also an “Essay on Manures” (New
