Steamships, by screw, paddle-wheel, stern wheel, water jet, and steam jet.

c.

Wave engine.

d.

Barges and rafts usually employ tidal motion only.

e.

Rowing boats, &c., hand power paddle and screw boats, horse towage.

a. Sails.

b. Steamships, by screw, paddle-wheel, stern wheel, water jet, and steam jet.

c. Wave engine.