Part 29

Poetry of the moon, 96.

Posidonius, 224.

Prism binoculars for viewing moon, 122.

Proclus, 68. remarkable brilliance of, 90.

Projectile force on moon, 37.

Promontorium Ænarium, 189.

Promontory Acherusia, 224.

Promontory Heraclides, 109.

Promontory Laplace, 109.

Ptolemæus, 98.

Pytheas, 216.

Rabbi Levi, 202.

Reinhold, 217.

Riccioli, nomenclature of, for lunar objects, 69.

Rings, ranges of, on moon, 97-98.

Riphæan Mountains, 190.

Rotation of moon “braked” by tides, 20.

Rotation of moon, illustrated, 19-20.

Sacrobosco, 206.

Schickard, 115.

Schmidt, observation of Linné by, 233.

Schröter, “lunar city” discovered by, 218.

“Seas,” lunar, character of beds of, 142.

Shadow of moon during eclipse, 40. length of, 40.

Shadows on moon, topography revealed by, 100-101. used to measure heights on moon, 63.

Sidereal revolution of moon, 11.

Sinus Æstuum, 103.

Sinus Iridum, 109.