19 MARCH 1864, Page 3

The new double-screw steamer Atalanta, 500 tons burden, 200 feet

long, with two screws worked by separate engines, has been tried at sea. She did in tolerably smooth water 221 miles in 75 minutes, and ran from Dover to Calais on Thursday, a rough day, in 77 minutes. This is an average rate of 17 miles and a fraction, which if it could be obtained on large steamers at a decent expen- diture of coal would nearly double the speed of the ocean mails.