^ 'fJppi*;^5^^'^!P'^:'^?r»?i?-^'!^^^-?^^ 



ERRATA, ALTERATIONS AND ADDITIONS. 



VOL. XXIV. 



In binding, place Dr. Hare's plates, as follows: evolution of silicon, now facing 

 p. 253, to face p. 248; that on the evolution of boron, which is the second as they 

 now stand, must face p. 250 ; that on the valve cock, the third as they now stand, to 

 face p. 251. Page 237, line 2 from the top, dele and. 



