Microscope
Gwneuthurwr anhysbys
Ref: Hamilton L. Smith, "Microscope," U.S. Patent 52901 (1866).
1866
MG.M-09776
Image and text © National Museum of American History, 2021
Ble byddwch chi'n dod o hyd i hwn
National Museum of American History
Casgliad barhaol