PIERCE, ABNER, (c. 1790). _Surveying Compass_ with Jacob's staff. Made of brass; 12 in. long; 5 in. in diameter; with needle lift. Jacob's staff 4 ft. high and with wood shaft about 1-1/2 in.; brass head. Unsigned. Used about 1790 by Abner Pierce, who built Pierce's Mill in Rock Creek, District of Columbia. Gift of Mrs. Francis D. Shoemaker of Washington, D.C., in 1930. USNM 309826. PRIESTLEY, JOSEPH (1733-1804), Northumberland, Pa. _Chemical Apparatus_ that formed part of the laboratory of Joseph Priestley at his home. It includes the following specimens: 3 chemical retorts, 6 bell jars, 1 gas collecting flask, 6 flasks, 4 funnels, 23 miscellaneous metal and glass objects, and 1 eudiometer. A special exhibition of some of this chemical apparatus was held in the U.S. National Museum in 1958 (see fig. 69). Gift of Miss Frances D. Priestley of Northumberland, Pa., in 1958. USNM 315341-315358. FIGURE 75. _Globes_, one terrestrial (fig. 76) and one celestial (fig. 77), that formed part of the equipment used by Dr. Joseph Priestley. The terrestrial globe, of 26 in. diameter, has a Sheraton mahogany tripod stand and is inscribed-- To the Rt. Honorable/Sir Joseph Banks, Bart. K.B./President of the Royal Society/containing all the latest Discoveries and Communications from the most/correct surveys to the year 1798/by Capt. Cook and more recent Navigators. Engraved upon an accurate degree by Mr. Arrowsmith, Geographer/Respectfully Dedicated/by his most obedient servant/W. & T. M. Bardin/Manufactured and Sold Wholesale and Retail by W. & T. M. Bardin/16 Salisbury Square/Fleet Street, London. [Illustration: Figure 75.--Special exhibition of chemical laboratory apparatus used by Dr. Joseph Priestley. USNM 315341-351358.] [Illustration: Figure 76.--Terrestrial globe made by W. & T. M. Bardin of London and used by Dr. Joseph Priestley. Diameter, 26 in. USNM 53253.] The celestial globe, also with a Sheraton mahogany tripod stand, has a diameter of 23 in. and is inscribed-- To the Rev./Nevil Maskelyne, D. D. F. R. S./Astronomer Royal/This New British Celestial Globe/containing the positions of nearly 6,000 stars, clusters, nebulae, Planetary Nebulae/& correctly computed & laid down for the year 1800 from the latest observations and discoveries by Dr. Maskelyne, Dr. Herschel, the Rev. Mr. Wollaston, etc., etc./Is respectfully dedicated by his most obedient hmbl Servants W. & T. M. Bardin, Manufactured and sold Wholesale & Retail by W. & T. M. Bardin/16 Salisbury Square/Fleet Street, London. Gifts of Mrs. Eliza R. Lyon of Williamsport, Pa., in 1893. USNM 53253, 53254. FIGURES 76, 77. _Orrery_, mounted on three legs 31 in. high, round top 22-1/2 in. in diameter. The planets shown are Mercury, Venus, Mars, Earth, Jupiter, and Saturn. The base is not original. Maker not known; English, 18th century.