Exp. 125, To study the construction and use of a simple
Wheatstone's Bridge.--The Simple Bridge.--Equipotential
Points.--Example.--Exp. 126, To measure the resistance of a wire
by means of Wheatstone's Bridge; the "bridge method."--Allowances
for Connections.--Exps. 127-137, To measure the resistances of
various wires, coils, etc., by the "bridge method."--Table.--Exp.
138, To study the effect of heat upon the resistance of
metals.--Effect of Heat upon Resistance.--Exp. 139, To measure
the resistance of a wire by the "method of substitution."--Simple
Rheostat.--Exp. 140, To measure the E. M. F. of a cell by
comparison with the two-fluid cell.--Exp. 141, To measure the
internal resistance of a cell by the "method of opposition."