And where'd Byrne get the money to buy them?

Suppose that the dielectric has a constant K, then we must multiply both sides by K and the expression for the energy per unit of volume of the field is equivalent to z DE **where D** is the displacement or polarization in the dielectric.

The resistance R can thus be divided into two factors, one of which is d 2, **where d** denotes the diameter of the shot in inches, and the other factor is denoted by p, where p is the resistance in pounds at the same velocity to a similar I-in.

Since the distribution of electricity may be considered to be constant over the surface S of the attracted disk, the mechanical force f on it is given by the expression,' f S(V - v)2 8 ird2 **where d** is the distance between the two plates.

If then two experiments are made, first with the upper plate connected to earth, and secondly, connected to the object being tested, we get an expression for the potential V of this conductor in the form V=A(d' - d), **where d** and d' are the distances of the fixed and movable plates from one another in the two cases, and A is some constant.