CONTENTS. 



Page. 



1 Investigation of the Curve of Quickest Descent, 



in reference to Mr, Ewarfs problem ; Memoirs, 

 vol, 2, (new series) page 248. By the 

 Rev. Edmund Sibson 1 



2 Further observations on the Floating Island of 



Derweiit Lake; with remarks on certain other 

 Phenomena. By Mr. Jonathan Otley. .. 19 



3 Observations on the Influence of Machinery upon 



the Working Classes of the community. By 

 John Kennedy, Esq 25 



A On a remarkable fact in the Natural History of 

 the Swallow Tribe. By John Blackwall, 

 F.L.S 30 



5 Meteorological observations made in the Township 



of Crumpsall, from 1821 to 1828, inclusive. 

 By John Blackwall, F.L.S 54 



6 Remarks on the State of Britain at the time of 



its conquest by the Romans. By Mr. Thomas 

 Hopkins 86 



