Experimental observations, and improvements in apparatus and manipulation : with theoretical suggestions respecting the causes of tornadoes, falling stars, and the Aurora borealis
Robert Hare's 1836 treatise, printed in Philadelphia by James Kay Jun. & Brother, sets out his experimental apparatus and manipulations, with theoretical notes on tornadoes, falling stars and the aurora. The engravings show laboratory instruments: a tall brass-fitted vertical apparatus with valves and a hand crank, a wheel-driven rig with ball-jointed arms, a graduated glass gauge beside a sealed metal vessel, and a boxed cylinder with a crank. Their precise cast-iron and brass forms, with lettered parts and tubing, suit designers wanting period scientific machinery and technical diagram detail.
