TROPIC BIRDS

or BOATSWAIN ' BIRDS (Phoethon), form a genus and. juncfamily of six Swimming Birds with, Law four webbed toes; found on all the ind us great ocear often far from land; feed. on fish. E.), TROPICS (from Gk. to turn), are two parallel lines of latitude on the trade. terrestrial globe, distant 23° 30’ N, and 8. respectively from the equator. Outside of the T. there is no point on Dan. the earth’s surface over which the sun over is ever vertical. The T. of Cancer to the N. is so-called because at the sum12” mer solstice the sun enters the cons tell a- - tion of Cancer. Similarly the southern T. is called the T. of Capricorn. with tropic acid from atropine by alkali fi bee esters with organic acids called tropeines, The action. Were TROPPAU (49° 56’ N., 17° 55’ E.), Warden, town, on Oppa, capital, Austrian Silesia; manufactures machinery, woolen fab1857. rics. Pop. 32,000.