Physician: son of Statira Colburn and Henry N. Guernsey.; born in Frankford, Philadelphia, in 1849; educated in the private schools of Philadelphia. and graduated from Princeton College in 1870; received degree of A. M. 1873; became a medical student in his father’s office: was graduated from Hahnemann Medical College, Philadelphia. In 1872: was quiz master of Materla Medica at Hahnemann Medical College; Provisional Secretary of the American Institute of Homeopathy 1876 and 1881. In 1893 President of the Homeopathic Medical Society of the State of Pennsylvania. He has been Vice President of the Philadelphia County Homeopathic Medical Society, and has served on the Bureaus of Materia Medica, Obstetrics and Sanitary Science; is a Trustee and Visiting Physician of the Hahnemann Medical College and Hahnemann Hospital of Philadelphia, honorary member of the Institute Homeopathic Mcxicano. In 1872 he established the North Eastern Homeopathic Free Dispensary at Kensington. Edited "Transactions of the Homeopathic Medical Society of Pennsylvania," 1874 to 1879, and the “Transactions of the American Institute of Homeopathy," of 1879; "Guernsey's Obstetrics and Diseases of Women and Children." From notes taken upon his father's lectures on Materta Medica, he compiled and published "Guernsey's Keynotes," also published a work on "Urinalysis;" co-editor of the "Repertory to Hering's Guiding Symptoms of our Materia Medica." Contributor to medical journals. He has been actively engaged in lecturing, etc. at Training School for Nurses, Hahnemann Hospital. Secretary and Treasurer of Board of Homeopathic Medical Examiners of Pennsylvania: 1894 he founded and has since been President of "The Saturday Night Club of Microscopists." In 1876 married Gertrude Thomas. daughter of Samuel Thomas, of (Catasauqua, Pa. Address. 1923 Chestnut St., Philadelphia, Pa.