ERRATA. 
Page 220, lines ii and 20, forL^ ^ ^ read L ^ c Page 221, line 21, for 
a,b,c,& c. Page 224, lines 2 and 5, insert a comma be- 
P 
a, b, c. See. n 
read 
m 
fore the seconds; line 15, insert : before a". Page 226, bottom line for n 
m 
read « 
m 
r 
y 
Page 227, line 14, for n 
m 
a, b, c, &c. P 
read n 
a, b, c, &c. 
Page 228, lines 1, 3 and 4, 
0 
for n 
m 
a, b, c, &c. reac j n 
— m 
a, b, c, &c. . jj lie j 2j f or n 
— m 
X , by Cf &C. , I r n 
read « <z, 0, c, &c. 
Page 240, line 8, for r-\- 1, read r-f x. Page 247, line 16, after — . 1 / insert ( , 
fJ* X -j- 71 
line 17, before the period insert ). Page 255, line 12, for +\p> read — \ p ; line 15, 
IT 
I 
for + \ , read — §. Page 290, line 6, for with, read without; line 14, for 1 
o 
read 
1 
1 
80 
Page 291, for N" and N / , read N. Page 294, line 5, insert t, before ; 
