This is a common alarm clock which has been modified through the addition of three paper scales. The original face is marked, "Jerome and Co." One of the paper scales is marked, "Pat. App. for." (Robert P. Multhauf, Catalogue of Instruments and Models, 51) Likely an alarm clock modified to tell time at various longitudes.

Round mirror in square wooden frame with brass screws at top and bottom, brass knob on top.

Brass triangular base 10 1/2" wide, with three leveling screws and two spirit levels. Upon it a vertical stands carries a triangular frame pivoted at the base. Its long arm carries an adjustable, threaded contact screw. The arm at right angle to this is acted upon by a cam mounted on the stand. Movement of the cam causes a hand to move over a scale from 0 to 220, and the contact screw to rise vertically one inch per 100 divisions. (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

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).

Glass globe with an iron axis and wooden end caps. There is an integral 3-sheave pulley on one cap. Unmarked except for an old, but not original, paper label associating it with David Rittenhouse. (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

Circular glass plate on spindle turning through four leather-covered pads to generate static electricity. Two of the pads marked "Haut" and "Bas." Standing on extended wooden platform. Conductors and other attachments are missing.

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).

Mahogany banjo-shaped case for hanging on a wall. Within is set a wheel barometer, controlling the needle of a dial set in the bottom, on which weather indications are given. A thermometer and hygrometer are also set in the front. Marked "Bishop, Portland St."

Square mirror on straight metal and wooden handle.

Bamboo cane with staghorn or bone handle and metal collar. Hole extending through the handle. Inscription on collar: "Exemplum adest ipse homo."

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).

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.

Unmarked except for a brass plaque (not original) stating that the battery was used by Benjamin Franklin. It contains thirty-five jars in seven rows of five, each jar having a height of 12 1/4" and a 2" square cross-section. Each is covered with foil to a height of about 9", and has a wooden cap from which contact wires project within. Through wires laid across the top, the jars are connected in series. This battery has been restored at some point in the past. Fifteen of the Leyden jars appear to be original; twenty are facsimiles and are so marked by a diamond point inscription on one side. The facsimiles were made in a mold which left a burr not present in the original, and are covered with foil on the outside only. (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

Hand-blown, green glass tube, rounded and sealed at both ends. One end is chipped. Unmarked. (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

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

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.

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).

Double-convex lens in wooden frame. Unmarked.