Page:A Treatise on Electricity and Magnetism - Volume 1.djvu/38

2 p. 159, l. 3, for $$F$$ read $$f$$.

l. 2 from bottom, for $$M$$ read $$M_2$$.

p. 163, l. 20, for $$\lambda_{i-s+1}$$ read $$\lambda_{i-\sigma+1}$$.

p. 164, equation (34), for $$(-1)^{i-s} \frac {\left | \underline{2s} \right .}{2^2s \left | \underline{i} \right. \left | \underline{s} \right. }$$ read $$(-1)^{i-\sigma} \frac {\left | \underline{2\sigma} \right .}{2^2\sigma \left | \underline{i} \right. \left | \underline{\sigma} \right .}$$

p. 179, equation (76), for $$i+l$$ read $$2i+1$$.

p. 185, equation (24), for $$\frac{x^2}{b^2}-\frac{z^2}{c^2}=1$$ read $$\frac{x^2}{b^2}-\frac{z^2}{c^2-b^2}=1$$.

p. 186, l. 5 from bottom, for 'The surface-density on the elliptic plate' read The surface-density on either side of the elliptic plate.

p. 186, equation (30), for $$2\pi$$ read $$4\pi$$.

p. 188, equation (38), for $$\pi^2$$ read $$2\pi^2$$.

p. 196, l. 27, for $$e..e$$ read $$e_1..e_2$$.

p. 197, equation (10) should be $$M = \frac{E \,e}{f}-\frac{1}{2}\frac{e^2 a^3}{f^2(f^2-a^2)}$$.

p. 204, l. 15 from bottom, dele either.

p. 215, l. 4, for $$\sqrt{2k}$$ read $$\sqrt{2} k$$.

p. 234, equation (13), for $$2E$$ read $$\frac{E}{2\pi}$$.

p. 335, dele last 14 lines.

p. 336, l. 1, dele therefore.

l. 2, for 'the potential at $$C$$ to exceed that at $$D$$ by $$P$$,' read a current, $$C$$, from $$X$$ to $$Y$$.

l. 4, for '$$C$$ to $$D$$ will cause the potential at $$A$$ to exceed that at $$B$$ by the same quantity $$P$$,' read $$X$$ to $$Y$$ will cause an equal current $$C$$ from $$A$$ to $$B$$.

p. 351, l. 3, for $$R_1^2 u^2 + R_2^2 v^2 + R_3^2 w^2$$ read $$R_1 u^2+R_2 v^2+R_3 w^2$$.

l. 5, read $$+2\iiint (u \frac{dV}{dx} +v \frac{dV}{dy} + w \frac{dV}{dz}) \, dx\, dy\, dz$$.

p. 355, last line, for $$S'$$ read $$S$$.

p. 356, equation (12), for $$ {\overline {\left. \frac {db}{d} \right |}}^2$$ read $${\overline {\left. \frac {db}{dx} \right |}}^2$$.

p. 365, in equations (12), (15), (16), for $$A$$ read $$Ar$$.

p. 366, equation (3), for $$\frac{E_2}{r_1}$$ read $$\frac{E_2}{r_2}$$.

p. 367, l. 5, for $$2k_1 S$$ read $$2k_2 S$$.

p. 368, equation (14), for $$J_2^'$$ read $$I_2^'$$.

p. 397, l. 1, for $$\frac {D'}{E} \delta'$$ read $$\frac {D'}{E'} \delta '$$.

p. 404, at the end of Art. 350 insert as follows:— When $$\gamma$$, the resistance to be measured, $$a$$, the resistance of the battery, and $$\alpha$$, the resistance of the galvanometer, are given, the best values of the other resistances have been shewn by Mr. Oliver Heaviside (Phil. Mag., Feb. 1873) to be