Browse Items (3400 total)

Very large fabric backed poster/wall-hanging of the y=sec x. and y=cosec x. graphs with wooden batons for weight. Rolled up, appears to be hand drawn.

Brass cylinder with rounded ends on glass stand on wooden base; small round wooden feet; one hole at top of each end of cylinder; with engraving

Plastc case containing 5.25 inch floppy disc in paper envelope and manual; label on disc reads, 'BBC B, B+, Mini Office II, 40 Track, C, Database software code 2369'; space for cassette is empty

marked as glassware

two brass discs the upper suspended by a movable rod above the lower, possible to move electrical charge to demonstrate capacitance. The upper disc is held by an insulated pillar and curved brass rod

glass dome with glass knob top

Wooden hinged box with metal handle. Card inside reads "Original box for 'lefebore's level". Empty. Storage for optical instrument

a glass mercury specific gravity hydrometer with paper scale insert 0.700 to 0.800 for light liquids. The bulb is separated from the float by a short length. In cardboard cylinder

glass hydrometer, scale 0-100, mercury weighted bottom bulb, brine percent

Small cylindrical box of 4 tiny mirrors individually wrapped in tissue paper. Hand written on box.