Lot 172: HERSCHEL, John Frederick William, Sir (1792-1871). "Account of Observations Made with a Twenty-Feet Reflecting Telescope." Extract from: The Memoirs of the Astronomical Society of London . Vol.3, pp.47-63. London: Printed by Richard Taylor,

HERSCHEL, John Frederick William, Sir (1792-1871). "Account of Observations Made with a Twenty-Feet Reflecting Telescope." Extract from: The Memoirs of the Astronomical Society of London. Vol.3, pp.47-63. London: Printed by Richard Taylor, 1827.

4o (279 x 222 mm). Disbound; quarter morocco slipcase. Provenance: Robert Honeyman (his sale part IV, Sotheby's London, 6 November 1979, lot 1659).

FIRST EDITION of the second part of Herschel's six-part catalog of double stars. The 20-foot telescope that he used in his observations was the largest telescope in the world at that time.

[Bound with:]

CHRISTIE, Samuel Hunter (1784-1865). "On Mutual Action of the Particles of Magnetic Bodies, and on the Law of Variation of the Magnetic Forces Generated at Different Distances during Rotation." Extract from: Philosophical Transactions, pp.3-53. London: Printed by W. Nicol, 1827. 4o. One plate. Provenance: Davies Gilbert (1767-1839), member of Parliament and president of the Royal Society from 1827-1830 (presentation inscription from the author on title-page). FIRST EDITION, PRESENTATION COPY, inscribed by Christie to Gilbert on the title-page. -- CHRISTIE. "On the Laws of the Deviation of Magnetized Needles Towards Iron." Extract from: Philosophical Transactions, pp.325-360. London: Printed by Richard Taylor, 1828. Title-page. 4o. Provenance: Davies Gilbert (presentation inscription from Christie on title-page). FIRST EDITION, PRESENTATION COPY, inscribed by Christie to Gilbert on the title-page. -- CHRISTIE. "On Magnetic Influence in the Solar Rays." Extract from: Philosophical Transactions, pp.379-396. London: Printed by Richard Taylor, 1828. 4o. Provenance: Davies Gilbert (presentation inscription from the author on title-page). FIRST EDITION, PRESENTATION COPY, inscribed by Christie to Gilbert on the title-page. -- BARLOW, Peter (1776-1862). "An Account of a Series of Experiments Made with a View to the Construction of an Achromatic Telescope with a Fluid Concave Lens..." Extract from: Philosophical Transactions, pp.105-112. [London, 1828]. 4o. Provenance: Davies Gilbert (presentation inscription from the author on title-page). FIRST EDITION, PRESENTATION COPY, inscribed by Barlow to Gilbert on p.105. (2)