Mercury Shower, by which the mercury is forced through the pores of hard wood, Fig. ... New Piston Expansion Stand of Brass, with Weights for force of expansion, 4.00 141. ... Revolving Fans and handle, to show resistance of air, .75 149.
|Title||:||Davis's Manual of Magnetism|
|Author||:||Daniel Davis, William Francis Channing, John Bacon (Jr.)|