162 NOTICES OF THE MEETINGS. [March 19. 
accounts, dated February, 1852, many new mines have been opened 
lately ; and all are worked more systematically than heretofore, — 
generally by contract. : 
There are now in the Cliff mine masses of pure copper within view 
estimated to weigh 700 tons in the whole ; and on the lands of the 
Minnesota Company, one block weighing 250 tons. The copper 
shipped in 1851 was about 1600 tons, valued at £130,000. This 
copper is stated to be of great excellence in the manufacture of 
wire, ordnance, and ship-sheathing. 
The large beds of specular and magnetic iron ore, on the south- 
east side of the lake, are as yet only worked on a small scale. 
At this moment the business of mining has ceased on the Canadian 
side of the Lake. There is little doubt, however, but that profitable 
deposits will, sooner or later, be discovered here. 
[J. J.B] 
In the Library were exhibited : — 
Falls in the Black River, Lake Superior, and other Views in Canada, 
by Dr. J. J. Bigsby, M.R.I. 
Roman Glass Vase, a small Bottle, and a Lamp found in the church- 
yard of St. Stephen’s (near St. Alban’s) about 61 ft. deep, a quarter 
of a mile from the Roman Verulam. The Vase contained pieces of 
bone and was much broken ; it was repaired by Mr. Doubleday 
of the British Museum as far as possible. Not any part of the 
rim was discovered. [Exhibited by 8. R. Solly, Esq., M.R.I.] 
[See a Pamphlet by M. H. Bloxam, Esq., on the Roman Sepul- 
chral Remains found near St. Alban’s, 8vo. 1849, — presented to 
the R. I. Library by Mr. S. R. Solly.] 
Specimens of British Glass and Porcelain. [Exhibited by Mr. 
Apsley Pellatt.] 
Models of Marine Engines : — Double Cylinder Engine and Vibrating 
Engine — and Engine of the ‘‘ Great Western.” [Exhibited by 
Messrs. Maudslays and Field. ] 
Rough Models of Nasmyth’s Steam-hammer and of Maudslay’s 
Vibrating Cylinder, from the Royal Institution Laboratory. 
Diagrams of Nasmyth’s Steam Pile-driver. [Presented by Mr. 
Nasmyth.] 
Model of the Disk-Engine by Mr. R. Addams. 
A Group of Humming-birds, from S. America, and a Group of 
Tanagers from neighbourhood of Rio Janeiro, Mounted by Messrs. 
Leadbeaters. 
Mr. Varley exhibited a Vial Microscope in which were shewn the 
circulation of the sap of a Plant, and a group of Trumpet ani- 
malcules. The rapid motion of their cilia by which they catch 
their prey was perceived. 
