FORMULA INDEX. 27 11-36 I1 ERRATA. VOL. CXV (TRANS. 1919). Page Line a14 816 9 for ‘(a,” read “ [.ID. 816 1 for (‘0‘1060 K,O” read ( ( 0’1006 H,O.” DAR ” read ‘‘ MAZUMDER. ERICK PAGE EVENS ’) read ‘‘ FREDERICK PAGE EVANS.” i’* for ‘(a;” wad ‘([alU.,’,’ Contents p. i line 14 p.,,821 in title and headlines pp. 821-825 for “MAZUM-Contents p. i line 6 p. 1140 in title and headlines pp. 1140-1144 for “FRED-* From bottom. 154