JAYNE, David, physician, born in Monroe county, Pennsylvania, 22 July, 1799; died in Philadelphia, Pennsylvania, 5 March, 1866. He was the son of Ebenezer Jayne, a Baptist clergyman, who was the author of a Baptist hymn book, and of various polemical essays. The son studied medicine and practised in New Jersey until 1836, when he settled in Philadelphia and continued his professional work in connection with a drug business. He also began the manufacture of medicines, which business grew to large proportions and made him wealthy. As early as 1849 he began to erect extensive granite and marble buildings in Philadelphia, and he continued to do so till the end of his life. At the time of his death he was about completing one of the finest residences in Philadelphia. Dr. Jayne is said to have been the first person to publish almanacs as a means of advertising, and these he printed in all the modern languages of Europe and Asia, including even some of the minor dialects of India.--His son, Horace, scientist, born in Philadelphia, 5 March, 1859, was graduated at the University of Pennsylvania in 1879, in medicine in 1882. He subsequently spent nearly two years abroad, studying biology in the university at Leipsic, and under Haeckel at Jena. On his return he was chosen lecturer in biology in the University of Pennsylvania, and subsequently professor of vertebrate morphology in the same institution, which place he now (1887) holds. He has written "A Revision of the Dermestidae of North America," "Abnormities observed in North American Coleoptera," and "Origin of the Fittest."