1A Short Account of the Library, [13 July 1741] (Franklin Papers)
...-Pump, with its Apparatus, a large double Microscope, and other valuable Instruments, from the...
2Directors of Library Company to John Penn, 3 August 1741 (Franklin Papers)
...to the Library Company of a curious Microscope and Camera Obscura is received. This fresh...
3Extracts from the Gazette, 1742 (Franklin Papers)
...A Choice Parcel of the best Spectacles, Microscopes, large and small Pocket Compasses with...
4Extracts from the Gazette, 1744 (Franklin Papers)
...Philadelphia, The Solar, or Camera Obscura Microscope, which magnifies Objects to a...
5Poor Richard Improved, 1748 (Franklin Papers)
...workmanship! And yet there are little animals discovered by the microscope, to whom a
6To Benjamin Franklin from Peter Collinson, 3 July 1750 (Franklin Papers)
Micrographia Illustrata; or, The Knowledge of the Microscope explained...double Microscope; a...
7Poor Richard Improved, 1751 (Franklin Papers)
That admirable Instrument the Microscope has opened to us of these latter Ages, a......Microscope...
8From Benjamin Franklin to John Perkins, 4 February 1753 (Franklin Papers)
.... It is thus, that a Hair in a Microscope evidently appears to be a Pipe, the Sides...
9From Benjamin Franklin to James Bowdoin, 13 December 1753 (Franklin Papers)
...Drop of Kennel Water magnify’d by the Solar Microscope to the Bigness of a Cart Wheel, there...
10To Benjamin Franklin from Peter Collinson, 14 January 1754 (Franklin Papers)
...Poor John Bartram has lost his Two Guinea Microscope and prints for Billey Seeds and Two or...