FOR THE WEEK ENDING MARCH 29, 1879.

Price 10 cents. For sale by all newsdealers.

I. ENGINEERING AND MECHANICS.--The Herreshoff Torpedo Boat, recently

built at Bristol, R. I., for the British Government. The novelties in

the placing of the screw, etc. The Peculiar Boiler. 4

figures.--Improved Hopper Steam Dredger. 2 figures.--The St. Gothard

Tunnel.--The Beacon Tower of Lavezzi. 3 figures.