Conjectures on the cause of thunder
Contributors: Pennypacker, Samuel W. (Samuel Whitaker), 1843-1916, former owner; Duane, William, 1808-1882, former owner; Franklin, Benjamin, 1706-1790, former owner
Publisher: [s.n.]
Published: 1756
Place of publication: Paris
Language: eng
Number of pages: 23
Subjects: Thunder; Early works to 1800; Career in science
Notes: Discusses Franklin's experiments.

Boston Public Library (Rare Books Department) copy: ex libris (bookplate) Samuel W. Pennypacker, William Duane, Jr.; contains ms. inscription by former owner William Duane, Jr., a great-grandson of Benjamin Franklin, noting that the ms. partial table of contents on the verso opposite the title page is in the hand of Franklin, a former owner; inscription of author's name in antique hand appears at the end.

Bound volume contains: 1. Conjectures on the cause of thunder -- 2. The philosophy of earthquakes, natural and religious -- 3. Sir Isaac Newton's æther realized -- 4. Lettre electrique sur la mort de m. Richmann.

Boston Public Library (Rare Books Department) copy bound in contemporary half calf over printed and embossed paper boards.