crew of six, a speedometer, spotlights, and a launcher at the bow capable of firing three torpedoes. Its two 30-horsepower electrical motors, powered by 613 batteries, gave it a theoretical range of 396 nautical miles and a maximum speed of 10.9 knots an hour at the surface." It underwent a series of trials in 1889 and 1890, all in the Bay of Cádiz. On June 7, 1890, it "successfully spent an hour submerged at a depth of 10 meters, following a set course of three and a half miles". He was celebrated by the public and honored by Maria Christina of Austria, Queen Regent of Spain. But Navy officials ultimately declared the submarine a "useless curiosity", scrapping the project. 1888–1890: Gustave Zédé and Arthur Constantin Krebs launch the Gymnote, a 60-foot submarine for the French Navy. "It was driven by a 55 horse power electric motor, originally powered by 564 Lalande-Chaperon alkaline cells by Coumelin, Desmazures et Baillache with a total capacity of 400 Amphours weighing 11 tons and delivering a maximum current of 166 Amps." She was launched on 24 September 1888 and would stay in service to 1908. The Gymnote underwent various trials to 1890, successful enough for the Navy to start building two "real fighting submarines", considerably larger. Several of the trials were intended to established tactical methods of using submarines in warfare. Several weapons were tested until it was decided that the torpedoes of Robert Whitehead were ideal for the job. The Gymnote proved effective in breaking blockades and surface ships had trouble spotting it. She was able to withstand explosions of up to 220 pounds of guncotton in a distance of 75 yards from its body. Shells of quick-firing guns, fired at short range, would explode in the water before hitting it. At long-range everything fired at the submarine, ended up ricocheting. The submarine proved "blind" when submerged, establishing the need of a periscope. 1889–1891: Almon Brown Strowger of Penfield, New York, files a patent for the stepping switch on March 12, 1889. Issued on March 10, 1891, it enabled automatic telephone exchanges. Since 1878, telephone communications were handled by telephone switchboards, staffed by telephone operators. Operators were not only responsible for connecting, monitoring and disconnecting calls. They were expected to provide "emotional support, emergency information, local news and gossip, business tips", etc. Strowger had reportedly felt the negative side of this development, while working