11 CONTENTS. 



Page 



VII. Account of a non-descript Worm (the Ascaris 



pellucidus) found in the Eyes of Horses in 

 India. In Letters from Alexander Kennedy, 

 M. D. F. R. S. Edin. to Professor Russel and 

 Dr Hope. With a Description of the Animal, 

 by Captain Thomas Brown, F. R. S. Edin. 

 &F.L. S. - - - 107 



VIII. Memoir relating to the Naval Tactics of the late 



John Clerk, Esq. of Eldin ; being a Frag- 

 ment of an intended Account of his Life. By 

 John Playfair, F, R. S. Lond. & Edin. 113 



IX. On Circidar Polarisation, as exhibited in the Op- 



tical Structure of the Atnethyst, with Remarks 

 on the Distribution of the Colouring matter in 

 that Mineral. By David Brewster, LL. D. 

 F. R. S. Lond. & Edin. - - 139 



X. An Examination of some Questions connected with 



Games of Chance. By Charles Babbage, Esq. 



F. R. S. Lond. & Edin. - - 153 



XI. On the Radiation of Caloric. By the Reverend 



Thomas Crompton Holland, - 179 



XII. Notice respecting a Remarkable Shower of Hail 



lohich fell in Orkney on the24:th of July 1818. 

 By Patrick Neil), F. R. S. E., F. L. S. & Sec. 

 Wern. Soc. - - - 187 



XIII. Obsei'vafions on the Mean Temperature of the 



Globe. By David Brewster, LL. D. F. R. S. 

 Lond. & Sec. R. S. Edin. - 201 



XIV. Method of determining the Latitude, by a Sex- 



tant or Circle, with simplicity and accuracy, 

 from Circum-meridian Observations, taken near 

 Noon. By Major-General Sir Thomas Bris- 

 bane, C. B. F. R. S. Edin. and Correspond- 

 ing Member of the Academy of Sciences, 227 



XV. 



