Fred A. Sperry November 1st, 1899 This receipt is for shellac, which Nikola Tesla used to seal wood and windings for air-core...
Frank F. Bumstead & Company December 12th, 1899 This receipt is for brass tubes, bolts and clips, a sheet of brass and labor for threading and...
El Paso Electric Company December 1st, 1899 Nikola Tesla's receipt from The El Paso Electric Company in Colorado Springs, Colorado for work...