Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 162,260 pages of information and 244,501 images on early companies, their products and the people who designed and built them.
Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.
649. BARKER, JOHN, M.D., 45 Mountjoy Street, Dublin — Inventor.
New medical instrument, for the purpose of rendering more efficient and certain the act of percussion in disease: by using the instrument with one hand, transmitted sounds can be employed in the diagnosis of diseases.
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