CARLSBAD, a city in south-eastern New Mexico, U.S.A., on the Pecos river; the county seat of Eddy county. The'population in 193o was 3,708. It is served by the Santa Fe railway, and is a shipping point for large quantities of cotton, wool, alfalfa and live stock. The Carlsbad irrigation project of the Federal Gov ernment comprises 25,o45ac., of which over 9o% is under crops. The city has cotton-gins, a cotton-seed oil mill and a gypsum plaster mill. There are five large lakes and mineral springs in the vicinity. In the Guadalupe mountains, 3om. S.W., is Carlsbad Cave National Monument, an immense cavern not yet fully ex plored, containing vast lofty chambers, with limestone formations of extraordinary beauty and impressiveness. The "Big Room" is over im. long and has a maximum width of 400ft. and a maxi mum height of 348 feet.