Page 20, last line but one, for “altogether” read “all together”
Page 25, para. 3, line 5, for “descriptive” read “disruptive.”
Page 30, para. 3, line 9, for “expansive” read “expansion.”
Page 31, para. 3, line 1, for “art” read “act.”
Page 32, para. 7, line 9, for “considerable” read “considerably.”
Page 32, para. 7, line 10, for “Robert” read “Piobert.”
Page 35, para. 3, line 1, for “sulphurate of Potassia” read “sulphide of Potassa.”
Page 36, para. 4, lines 1 and 2, for “which is a mortar” read “the chamber being.”
Page 40, last line but 3, for “Polyreetes” read “Polyorcetes.”
Page 41, para. 4, line 10, for “ix” read “xii.”