Vlii CONTENTS. 



Page 



cultations of Fixed Stars by the Moon, in July 1833 483 



Meteorological Observations 484? 



Index 485 



PLATES. 



Plate I. Illustrative of Mr. Sturgeon's Theory of Magnetic Electricity ; 

 and of Mr. Potter's new Heliostat. 



Plate II. Illustrative of Dr. Fitton's Notes on the History of English 

 Geology. 



Plate III. Illustrative of Mr. Potter's Experiments on the Interference 

 of Light ; and of Sir J. F.W. Herschel's Account of a pe- 

 culiar Deposition of Ice. 



Plate IV. Illustrative of Messrs. Enys's and Fox's Communications on 

 the. Granite of Penryn ; and of Mr. Nixon's Horizon-Sector. 



Plate V. Illustrative of Mr. Pritchard's Paper on Test Objects for 

 Microscopes. 



ERRATA in VOL. I. and VOL. II. 



Vol. I. Page 174, line 7 from the bottom, dele the word " not". 



294, 3 from bottom, for and no part thereof on rain 



read and no part thereof on depth. 



470, 23 from bottom, for changing read charging. 



431, 6 from bottom, after 100°, add we require to have 



the positions of these two places. 



— — 439, 1 1 from bottom,/or spectrum read picture. 



440, 21, for spectrum read picture. 



440, 3 from bottom,/or crowded read crossed. 



f£> — \ frora bottora > Wor covered read partially removed. 



Vol.11. Page 79, line 10 from bottom, after distilled dele the comma. 



221, for -p read fll^ hout . 



for q read p ) b 



Equations (1) and (2), for h h read h n 



lines 15 and 16, for <7-fAsin- read »•— h sin — . 



1 n r n 



238, line 9, for nitrate flame read nitrate of lime. 



: 317 23, for March 26th read March 25th. 



