E.Selling.
Calculating machine.		 4 Sheets - Sheet 3.
No. 420,667. Patented Feb. 4, 1890.
Fig.5 (3kB) Fig.4 (9kB)
Fig.7 (6kB) Fig.6 (5kB)
Fig.3 (39kB) Fig.6a (4kB)
Text Sheet 1 Sheet 2 Sheet 4