ERRATA IN VOL. IV. 



l*age 420, line 42, for and portions of the gneiss, read not portions of tlic gnfeisj. 



— 421, 34, — a granite through gneiss, read or granite through gneiss. 



421, — * 36, — sea coast, read east coast. 



■ 423, 25, — interrupted, read intermixed. 



448, 34, — pinna;, read donax. 



ERRATA IN VOL. V. 



Page 56, line 12, for + |/ — 1, read ± y' — !• 



56, — 18, — yrz ^Z a a — x x, read y z^ ± ■\/ a a — x x. 

 58, 22, — experimental, read exponential. 



59^ 14, — ± 2 7r V' — 1 ( ^= — T ), read ± 2 v V 



59, 16, — ± 2 TT v' - 1 [ -^ — 1, read ± 2 tt V 



60, 25, — 185, read 55. 



There is an error in the diagritm, Plate XXVII., which, referring only to the 

 line that is drawn tlirough the centre, may be corrected without a new plate. The 

 small o at the centre should be a large one, and the consecutive figures under the 

 units and above ihrm should refer to the circles which they touch. Thus 1 is right, 



o 

 but the following is 1, which should be 1, and so on. 



a I 



Page 218, morning observation. May, 1814, /or 24° 12' 49", read 24° 13' 12"; 



difference /or + 0'47", read 1' 10". 

 Page 218, noon ob>-ervation, Nov. difference /or — 0' 13", read + 0' 13", 



218. mnrning observation, Jan. 1815, fur 24° 16' 26", read 84° 16' 46". 



— — 229, line 4, for Matleugh, read Macie.ay. 



— — 397, 1, — or Changelica, read Archangelica. 



