SCIENTIFIC COMMUNICATIONS. 
21 
Oil the most advantageous mode of burning Coal-gas: by the Rev. 
Wm. 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. Y. 
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 Gocdmanham : 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 Cliff by Messrs. Dikes, Phillips, Salmond, and himself: 
by the Rev. W. V. Vernon, F.R.S. 1 2 
Nov. 3rd.—On the deposit of Stream Tin in Cornwall : by W. J 9 
Hen wood, Esq. F.G.S. 
Dec. 1st.—On the Geology of Havre de Grace : by John Phillips, 
F.G.S. 3 
1 See Philosophical Magazine for September,, 1829, 
2 Philosophical Magazine for March, 1830. 
