Glass and Mercury thermometer with fabric strap, fabric case, and metal case. Glass of thermometer is etched with degree lines and the degrees 10 through 240, in ten-degree increments. Also etched "Farenheit." Presented with the papers of Charles M. Wheatley (APS Library).

Square mirror on straight metal and wooden handle.

Received as a set with optical set (58.56b). additional small box with 7 extra pieces on shelf with 58.56b. Compound microscope, 14 1/2" high; unmarked.

Double-convex lens in wooden frame. Unmarked.

Compound microscope, 14 1/2" high; solar microscope with 6 1/2" barrel; shagreen box containing accessories. Unmarked. The Curator's Donation Book refers to this as a "magazine microscope in a Shagreen case, consisting of a single, double, and solar microscopes." At present the shagreen case contains a number of accessories, but will not fit the compound (double) or the solar microscopes. The lens of the single (simple) microscope is missing. The style of the instruments, nevertheless, suggests that they are part of a unit belonging to the period of this donation. (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

Brass instrument, with horizontal dial with a 5 3/8" needle and scale from 0 to 110. The needle is mounted on a vertical spindle about 5" long. The spindle is mounted on bearings at top and bottom, the latter being a needle in the center of a mica disc. A fine spiral spring extends over 4" of the spindle, and is attached to it at the bottom and to the frame at the top. The spindle and spring are covered by a brass housing which can be pulled off. Instrument has ill-fitting top which may not be original. Top is inscribed with "S. Homer May 27 1863" and "Samuel Homer Aug 27 1863."

Brass instrument on wooden stand. Inscription on brass says "Pixii, Neveu et Succeur de Dumotiez a Paris." Paper label on base says "The property of Dr. Hare value [?] Smithsonian."

Hydrometer consists of a buoyant brass sphere, from which weighing pans project above and below. Housed with seven weights in original wooden box, lined with felt. The weights are marked: 424, 384, 192, 96, 48, 24, 12.

Rotating drum, grooved and marked from 0 to 100 in 1-unit increments around circumference. Drum is turned with a protruding knob. Wood stand is marked "Fritz Kohler Leipzig."

Brass variation transit (magnetometer), in oak box. Instrument has two telescope assemblies.

Brass drum microscope stored in a wooden box with three glass slides, labeled in French: "ver à soie Trachées," "aile de Mouche," and "Angles d'araignée." Label inside box reads "JAMES W. QUEEN & CO / OPTICIANS, ____ WALNUT ST., PHILADELPHIA."

Plaster model of a three-dimensional surface. The printed inscription reads, "Model of the magnetic surface presented in the discussion Part II of the magnetic observations made at the Girard College Philadelphia between 1840 and 1845, by Prof. A.D. Bache. Const. and modeled by Ferdinand Engel, Washington, D.C. 1862." A handwritten description reads, "Presented by A.D. Bache." The observations which this model records are described in a 36-page pamphlet published by the Smithsonian Institution in 1863. A note with the model states that Bache intended to make two more models of the horizontal and vertical forces; one of these is now at the Smithsonian.

A black walnut box containing two measuring tubes; one with 1 1/4" diameter screen disc and 5" long tube and one with 6" screen disc and 2 3/4" long tube. This is an experimental instrument fabricated of discs of bronze or brass screen, attached to a brass tubing to constitute an anemometer. (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

Glass jar in walnut frame resembling a book press. There is a fragment of a printed paper label, on which the words "de Morveau" and "l'air" can still be seen. (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

Walnut frame resembling book press. Glass jar is missing. Manufactured by Dumotiez et Boullay.