The 43" tube is fabricated of cast brass sheet. The focal length is 45" and total length of the tube equals 46 1/2" and it is mounted on a mahogany tripod for use in a standing position. The finder is a 9 3/4" telescope with crossed hairs. The control handle for horizontal adjustment is missing, as is part of that for vertical adjustment. The wooden tripod can be used as altazimuth or parallactic mounting so that the telescope might be used for terrestrial or celestial viewing. The wooden, cylindrical, telescope base on top of the tripod is divided into two halves of an angle of 25 1/2° and pivoted at the center on a tapered axis, vertical to the plane of division. When the two halves form a cylinder, the top surface is horizontal and may be used for terrestrial viewing. By turning the top half 180°, the top surface makes an angle of 51° with the horizontal (the latitude of London). These two positions are indicated on the cylindrical bodies by two lines, 180° apart. The lines of marked by two thin ivory strips inlaid in the wood. Marked, "Dollond, London." (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

Celestial globe mounted on a four-legged wooden stand. Equator of stand notes months and corresponding astrological signs, as well as measurements affixed on paper. Brass meridian circle. Inscribed: "Britanniarium REGI Augustissimo/GEORGIO TERTIO. Astronomorum Patrono Munificentissimo, Celeberrimo Globum hunc Cælestem, Novam et Emendatiorem Cæti Imaginem, Syder apud Africæ Promontorium Aufrical nuperrime observata, Atq Stellas Catalogi Flamistediami Universas, vere exprimentem. Grati anime et pietatis Monumentum, D. D. Q. Omni cultu et officio devinctissimus G. Adams./Londinin apud G. Adams artificem Regium in vico Fleet Street."

Inscribed: "To the Rev. Nevil Maskelyne, D.D., F.R.S., Astronomer Royal, this new British Celestial Globe. Containing the positions of nearly 6000 Stars, Clusters, Nebulae, Planetary Nebulae, etc. correctly computed and laid down for the year 1800 from the latest observations and discoveries by Dr. Maskelyne, Dr. Hershel, the Rev. Mr. Wollaston, etc., etc. is respectfully dedicated by his most obedient hbl servents [sic] Wm. G.M. Bardin." In addition to the usual constellations, the celestial globe includes others in the extreme southern hemisphere named for the air pump, mariner's compass, chemical furnace, sculptor's apparatus, microscope, painter's easel, clock, telescope, and drawing compass. Also affixed with a paper tag, "Sold by W. & S. Jones, Holborn, London." (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

Inscribed: "To the Rt. Honorable Sir Joseph Banks, Bart., President of the Royal Society, this new British terrestrial globe containing all the latest discoveries and communications from the most correct and authentic observations and surveys to the year 1799 by Capn Cook and more recent navigators. Engraved from an accurate drawing by Mr. Arrowsmith, Geographer, is respectfully dedicated by His most obedient serven Wm. H. [partially obliterated] Bardin." Also affixed with a paper tag, "Sold by W. & S. Jones, Holborn, London." (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

Mahogany case. Bell-top hood with three beet-shaped wooden finials, the base of the center one being flanked by brackets resembling thorny branches. The dial is 12 1/2" square, of silvered brass. Marked "Duffield, Philada." The movement has a time train of four arbors and is conventional. The deadbeat escapement is located between the plates. An 8-pound pendulum with a pine rod and lens-shaped bob is driven by a crutch wire. It is adjustable but not compensated. (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

The sitter faces the viewer’s right in three-quarter view. He has a receding hairline with short, thin, graying hair and a prominent brow, and his right ear is visible. He is dressed in a dark overcoat and white cravat, positioned against a dark, somewhat modulated background.

Portrait with head and shoulders visible to above waist. Body slightly turned right, head facing forward. Figure wears red academic robe, brown coat and waistcoat, blue cravat. Signed "Lazar Raditz" in lower right corner. After ca. 1894 photograph.

Rectangular wood dial covered with paper consisting of two leaves that fold flat. The dial is surrounded by a decorative border with a floral pattern. String gnomon (no longer extant) would attach between the inner surfaces of the two leaves. Exterior top: list of cities in the Americas, Italy, France, Spain, and Germany along with sundial's numerical position. Interior: sundial base and embedded compass (no longer functioning).

Marble portrait bust with bare shoulders and upper chest. The subject has wavy, cropped hair and a stern expression. "D. RITTENHOUSE" inscribed on the base. "DE FACIE PHILADELPHIAE / EX ECTIPO FLORENTIAE / FACIEBAT JOS. CERACCHI / CIDDCCLXXXXIV" incised on verso.

This telescope consists of a 35" brass tube with a 2.95" aperture, and focal length of approximately 25". There is an integral folding brass stand, for use on a table. There are two terrestrial and four astronomical eyepieces, all of the Huygens type, the use of which is described in an instruction sheet affixed to the box. The small intermediate lens, a cemented doublet of 1.4" characteristic of this type of telescope, is located within the tube. The instrument is Inscribed: "Dialytical telescope for the use of the American Philosophical Society held at Philadelphia. Invented 1832 and made by S. Plösel in Vienna the 1 of August 1834." (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

Brass construction, mahogany covered, one telescoping section. 1 5/8" aperture. Length 20" closed, 35 1/2" extended. Marked "Blunt, Cornhill, London." (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

The telescope is made of brass and consists of a 33 1/2" tube on 25" axis with a 1 3/4" aperture and a focal length of 32". Mounted on a brass stand of two rigidly connected A-frames, for use on a table. There are crossed hairs in focal plane, semi-circular scale of 9" radius attached to the bottom of the tube, and a suspended spirit level. Its construction is generally in accordance with earlier European convention. Unmarked. (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

Seated three-quarter length figure, head and body turned right. Right hand holds book, and left hand holds gown. Background at left includes wooden table with books, papers, and microscope. Figures wears academic gown, black suit, tie, white shirt. Signed "H. R. Butler/ 33" on lower right corner.

Pine case without embellishment. The dial is 10 5/8" diameter, probably of cold silvered brass. Unmarked. Heavy brass plates with a pillar at each of the four corners contain the deadbeat escapement and going train of two many-toothed wheels. The motion work is between the dial and front plate. A small gear on the #2 gear arbor drives a large gear carrying the minute hand. The hour hand is driven by the latter gear through a compound idler gear and pinion. The second hand is mounted on the escape wheel arbor. The pendulum vibrates seconds and is mercury compensated. It is in two pieces connected by a yoke, and suspended by two springs. A thermometer is mounted on the back of the case. (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

Two blocks of wood, hinged to be closed for carrying. A compass is set in the lower block. Both blocks are scaled to the gnomon which is a thread extending diagonally between them. The cover block has on its exterior surface a rotatable wooden disc with pointer and scale. Marked with tables and scales in Chinese script. Down the sides of the dial are 13 holes for setting the angle of the lunar dial. (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

Brass octagonal plate with gnomon. Conventional style of horizontal pedestal dial. Marked "John Iles, Londini, 1725, Sunny Hours." Inscribed figure of Father Time.

Insulated glass container with platinum wires, brass, and mesh. Presented along with the papers of William Francis Gray Swann (APS Library).

Head and shoulders of subject, slightly turned right. Wears robe, dark coat, and cravat with stickpin. Dark brown background. After ca. 1899 portrait by artist, who copied a 1897 photograph.

This telescope includes a 2" aperture. Its length is 10 1/4" closed, 32 1/4" extended. It is constructed out of brass and the outermost telescoping section is covered with reddened wood. This instrument is marked, "Plösel in Wien." Handwriting on tube reads: "Presented to the Am. Philos. Society Philadelphia / By Charles Nagy Member of the Hungarian Acady / attached is Imperial -- Vienna -- of Sciences of Pest-- / Jany 4, 1833." (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

Two-draw hand telescope; brass, with mahogany barrel. The eye-piece is protected by a sliding guard; a brass cap fits over the end of the barrel. No maker's mark. Probably of English origin, about 1800. Retains its original chamois case.