Black slate stone in the form of a dodecahedron (a geometric solid with twelve flat faces). The side of each pentagon is about one and one half inches. Markings are incised on the faces.

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).

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).

Small leather-covered wooden box containing ten brass weights. Each weight is inscribed with letters and numbers. A slide covers a collection of ten (originally twelve) smaller silver weights, the largest of which is marked 128. Paper label on front of box labeled "German weights for coins".

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."

Brass construction. The instrument consists of a plate supported by an L-shaped arm and foot. A thumbscrew on the plate causes a pencil below to describe the figure, through a train of four gears, the last of which carries the pencil at the end of an arm. (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 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 circular box of 3" diameter, 1 3/4" high, into which is built a sextant. Unmarked.