ERRATA IN VOL. II. 



Page 4S8, line 13 from bottom, for continuously read cautiously. 

 — 489, — 1 from top, for with all the rest read with all, the test. 



ERRATUM IN VOL III. 

 Page 38 line 16 for +•++•+ +•- 



read +.+ +•+ +•- 



PLATES. 



I. Illustrative of Dr. Schlagintweit's Paper on the Optical Phenomena 

 of the Atmosphere in the Alps. 



II. Illustrative of Sir D. Brewster's Paper on several New Stereoscopes. 



III. Illustrative of Prof. Magnus's Paper on Thermo-electric Currents. 



IV. Illustrative of Dr. W. Bird Herapath's Paper on the Optical Proper- 



ties of a newly-discovered Salt of Quinine. 



V. Illustrative of Sir D. Brewster's Paper on the Development and Ex- 

 tinction of regular Doubly-refracting Structures in the Crystalline 

 Lenses of Animals after Death. 



VI. Illustrative of M. A. G. C. Martin's Paper on the Amylum Grains 



of the Potatoe ; and Sir D. Brewster's Paper on a Remarkable 

 Property of the Diamond. 



VII. and VIII. Illustrative of Prof. Wheatstone's Paper on the Physiology 



of Vision. 



IX. Illustrative of Dr. Kohlrausch's Paper on the Electroscopic Proper- 



ties of the Voltaic Circuit ; and Prof. Ragona-Sciua's Paper on 

 the Longitudinal Lines of the Solar Spectrum. 



X. Illustrative of Dr. Faraday's Paper on the Physical Character of the 



Lines of Magnetic Force. 



XI. Illustrative of Mr. J. P. Joule's Paper on the Heat disengaged in 

 Chemical Combinations. 



XII. Illustrative of Prof. Wheatstone's Paper on the Physiology of Vision. 



