SCIENTIFIC COMMUNICATIONS. 21 



On the most advantageous mode of burning Coal-gas : by the Rev. 

 Wra. Taylor. 



July 7th. — On a new form of Pump : by the Rev. Wm. Taylor. 



Remarks on the colouring matter of purple fluor spar, and of black 

 marble ; and on the presence of crystalline fragments of calcareous 

 spar in the black pottery of the Romans : by the Rev. W. V. 

 Vernon, F.R.S. 



Oct. 6th. — On Roman Roads across the Wolds of Yorkshire : by 

 the Rev. T. Rankin. 



Observations on a supposed encampment near Goodmanham : by 

 the Rev. W. V. Vernon, F.R.S. 



. On the arrangements of Museums in Belgium, Germany, and 

 France : by John Phillips, F.G.S. 



Account of Observations made on a deposit of bones and shells 

 near North CliflF by Messrs. Dikes^ Phillips, Salmond, and himself : 

 "by the Rev. W. V. Vernon, F.R.S. ' 



Nov. 3rd. — On the deposit of Stream Tin in Cornwall : by W. J. 

 Kenwood, Esq. F.G.S. 



Dec. 1st. — On the Geology of Havre de Grace : by John Phillips, 

 F.G.S.' 



See Philosophical Magazine for September, 1829. 

 ' Philosophical Magazine for March, 18S0. 



