Word: coiling
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This was the second attempt made by Professor Trowbridge to obtain the desired effect with a Crooke's tube. The first attempt, made a few minutes before, was partly successful. The ordinary sixty-volt alternating current used for lighting the building was sent through the primary of an ordinary coil. The resistance of the primary of this coil is one-tenth of an ohm, and of the secondary 6000 ohms. The current through the primary was not stronger than 15 ampheres. The current from the secondary of the first coil was sent through the primary of 25 turns...
...current thus furnished to the coil being an alternating one, the appearance of the tube during action was somewhat different from that ordinarily described. The fluorescent effects were less sharply localized than usual. From the ease with which the photographic effect was obtained, it appears doubtful whether so complicated and powerful electrical apparatus was really necessary. It happened to be at hand and was therefore used. It is evident that the impression obtained on the plate is rather a print than a negative...
...motor is a dynamo reversed, the current going into the coil and causing its revolution. Power is commonly transmitted in this way with an efficiency of 74 per cent. of the power applied. Since the current always equals the pressure divided by the resistance and a man's resistance is about 2000 ohms, he cannot take more than a quarter an ampere from the 500 volt current of the street railway, whereas 10 amperes are necessary to kill. Interesting and convincing statistics were cited to prove the number of deaths from electricity almost nothing compared with those from all other...
...launch is laid up for the winter at Sawley's yard, South Boston. The boat is an expensive one to run. She has a coil boiler which has a habit of bursting about every other day. The virtue of being able to get up steam in a few minutes has to be paid for by an uncertainty of keeping it up. The cost of keeping the boat in repair is fully equal to that of running her. She is not a good boat for cold weather. There is no house over the running gear, so that the many water pipes...
Active measures are being taken to secure the safety of students in case of fire. For each room above the second story a coil of rope will be provided, with one end fastened to a hook attached to a staple. The coil will rest upon a handle and will be kept in place by a strap, so that it will at all times be ready for instant service...