Scientific American May 1 1yo2. 4> … Men, women and young people, here is « splendid open- date of paper and page or number of question. cal and DEPARTMENT Fath ELECTRICAL ENGINEERING in Write for particulars. U. 8s. PUBLICATION Inquiries not answered in reasonable time should be Dep’t 12, 125 E. 23a Street. New York. Scientific GIVEN…
Internet Archive · Public domain (published before 1931). Free to use for anything.
