STATISTICS OF EMIGRANTS ARRIVING IN THE UNITED STATES SINCE 1820.

TABLE.-Showing the number of Patents issued for each of the following mechanical devices since the organization of the U. S. Patent Office :-

Bee-hives...

645

Bending-machines for wood and metal.

144

Boots and shoes, manufacture of, and articles used

Pavements..

404

Photography..

346

Planing-machines, wood and metal.

Propellers, and apparatus for...

Printing-presses, apparatus and material.

Railways, apparatus and connections.

Rotary engines.

384

570

756

1,552

170

From the Report of the U. S. Commissioner of Patents.

1790

75

8,875