740 



ments for measuring the Speed of Ships ;— Third Eeport on the Datum-level of the 

 Ordnance Survey of Great Britain ;— Second Eeport on Patent Legislation ;— On 

 Self-acting Intermittent Siphons and the conditions which determine the com- 

 mencement of their Action ; — On some fm'ther Evidence as to the Eange of the 

 Palseozoic Eocks beneath the South-east of England ;— Hydrography, Past and 

 Present, 



Together with the Transactions of the Sections, Prof. Allman's Address, and 

 Eecommendations of the Association and its Committees. 



