ERRATA. 
Page 69, lines 4 and 6 (from bottom) ; for “5” read “ 4,” 
70, — 9and11; for “7” read “6.” 
—— 71, — 6and8; for “9” read “8.” 
— 71, — 18 and 20; for “11” read “10.” 
— 73, — 2and 4; for “13” read “12.” 
—— 73, — 17 and 18; for “15” read “14.” 
—— 76, line 13; for “their” read “ these.” 
—— 84, — 14 (from bottom); for “then” sead “there.” 
—— 89, — 10; for “worked” read “ marked.” 
—— 132, — 1 of § 4; for “(1)” read “the general quintic.” 
—— 140, — 7 of § 27; omit “—-5” and “+K.” 
—— 140, — 9 of § 27; omit “and K is known.” 
