Press of wood construction, with worm and rack of brass. Faintly inked "American Philosophical Society. Given by Francis Dacosta, May 21, 1819."

Steel and cast-iron model of a locomotive firebox supported by a frame, to which is also attached a pair of locomotive wheels, eccentric, and actuating mechanism. Unmarked.

Truncated pyramid of mahogany, consisting of two identical interlocking halves. There is an oval aperture on the top, and holes at the bottom on all four sides. (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

White pine model of a gate-frame, with a long wooden plug valve across the bottom. Marked with a contemporary inked inscription "Model of a Rolling-draw Gate presented by Nathan Sellers 19 April 1811." (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

Simple wooden model of a press, hand operated through a toggle. Ratchet on side

This ship's log consists of a vertical-turned brass rod with a slot in the top for a pulley or fulcrum which is missing. A pair of shorter rods support between them a pivoted brass quadrant which is scaled but not numbered. The base is scaled radially from the axis of the quadrant. Inscribed "Porters A Conno(e)r" on the base. Paper on underside label marked "Porter Constant Log." (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

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).

Short, solid wooden model of a boat, having two supporting legs at one end. The bottom has a longitudinal concave depression, and the deck a group of shallow slits and holes. Side of model has paper affixed to it with words "life buoy by Talbot Hamilton" faintly written.

Elegantly made brass-bound wooden box with inlaid top. The top and bottom fold out to form a writing table. An integral frame supports two writing pens. A brass plate is inscribed, "Hawkins' Patent Polygraph, Manufactured and Sold by I.H. Farthing, No. 43, Cornhill, London. No. 282." (Robert P. Multhauf, "Catalogue of Instruments and Models," 1961).

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.