Carlsbad
2 of the 7 encyclopedias on this shelf carry an entry for Carlsbad. Both are reproduced below, so you can see where they agree and where they differ.
Aiton's Encyclopedia (1910)
karls'bad (Charles's Bath), a city of Bohemia built up around the celebrated hot springs of that name. The name was given in honor of Emperor Charles IV, who is said to have discovered the value of their waters a hundred years before the birth of Columbus. The waters of the springs are charged with salts, and are of remarkable virtue in curing rheumatism, gout, and kindred ailments. The water is drunk on the spot. It is bottled also and sold throughout Europe and America. Carlsbad is a well built city of 15,000 inhabitants, with hotels, hospitals, theaters, opera houses, concert gardens, and every other convenience or luxury that wealth can supply. It has long been a brilliant social center. Archduke Ferdinand, George III, Augustus I of Poland, Peter the Great, Leibnitz, Maria Theresa , Goethe, Schiller, Beethoven, Wellington, Bismarck, and thousands of other celebrated persons, together with the aristocracy of Europe, have visited Carlsbad to regain their health or for social pleasures. About 25,000 summer visitors frequent the springs. The largest, the Sprudel, gushes up to a height of about three feet above the ground. The flow of the various springs is estimated at about 2,000,000 gallons daily. There are over fifty lace factories in the neighborhood.
Collier's New Encyclopedia (1921)
or KARLSBAD, a town in Bohemia (Czecho-Slovakia), on the Tepl, near its influx to the Eger, 116 miles W. by N. of Prague. It is widely celebrated for its hot mineral springs, and is frequented in summer by visitors from all parts of Europe. The permanent population numbers about 20,000, who are very industrious, making jewelry, porcelain, and various articles such as are likely to find ready purchasers among the visitors, who in the season- April to October-number from 25,000 to 30,000. Set in most lovely vely scenery, the town is well built, and offers good accommodation for its guests. The temperature of the hot springs varies from 117° to 167° F. The principal spring, the Sprudel, has a very large volume, and is forced up to a height of three feet from the ground. Altogether, the daily flow of the sp springs of Carlsbad is estimated at 2,000,000 gallons. The principal ingredient in the water is sulphate of soda. The whole town of Carlsbad appears to stand on a vast caldron of boiling water, which is kept from bursting only by the safety-valves the springs provide. Ascribing bing its foundation to the Emperor Charles IV. (1347), Carlsbad was made a free town by Joseph I.