Demonstration of the great power of air pressure. When the comparatively small hemispheres are evacuated they are very difficult to pull apart, requiring a foce exceeding 400 N. Thick-walled brass hemispheres with central rim; one handle post with 2…
Magnifying glass in wooden frame on brass stand with "W. Ladd, London, Univ. Abdn. Nat. Phil." engraved on base. Can be adjusted in height but is very stiff.
Bronze figure of a man on a rearing horse, man holding a spear in his right hand. The horse sits on an oval-shaped base, and is sitted with a bridle, reins, a decorative rug and saddle with hand-hold. The male figure is wearing a circular cap on his…