ERRATA. 
Page 95, line 3 of note, for was very faint ead is very faint. 
» 96, line 18, for so far as read as far as. 
% 97, 5th line of par. 8, for states read state. 
,, 100, line 12, for takes read take. 
Frame aee telah line of note, for Phil. Mag. xxiv. 2. read Phil. Mag. xxiy. p. 2. 
101, line 20, for colouring-matter or its combustion vead colouring-matter and 
its combustion. 
»» x» in note **, 6th line from bottom of page, for Mr. Wedgwood read Th. 
Wedgwood. 
,, 103, line 12, for were read was. 
,, 9339, middle of page, for Fourth Report read Fifth Report. 
