Find More Images
Click a category below, or select multiple categories and click "Go."
Image ID: 1643240
How to make a valve amplifier for the B.D.V. crystal set
NYPL Digital Gallery provides free and open access to over 800,000 images digitized from primary sources and printed rarities in the vast collections of The New York Public Library, including drawings, illuminated manuscripts, historical maps, vintage posters, rare prints and photographs, illustrated books, printed ephemera, and more.