PLATES. 



I. A Plate illustrative of Professor Faraday's Experimental Researches 

 in Electricity. 

 II. An Engraving from a Drawing by Bauer, illustrative of Mr. Thomson's 

 Paper on the Mummy Cloth of Egypt. 



ERRATA. 



Page 91, line 1 7, dele By continued effusions of distilled water. 



92, — 21-22, after lime insert water: after boiled, insert a full stop. 



92, — 28, after mentioned insert (4. and 5.) 



93, — 27, after water insert it was as copper ; 



94, — 27, dele (28.) 



95, — 14, for (32.) read (38.) 



191, — 6, for s — , read s -j-, and for a. read a. 



191, — 13, for y 2 — , read 3/ 2 +. 



