28o 



SCIENCE. 



[Vol. XV. No. 378 



even at the highest speeds, there can be no sudden irregularities 

 of pressure or pounding upon the crank-pin. The working parts 

 being incased, they are exempt from the extra wear induced by 

 the accumulation and grinding-in of dust and dirt. 



The engine of this type now on exhibition at the company's of- 

 fice in this city is neat and compact, and very light for the amount 



of power claimed. IJ should be admirably adapted for running 

 dynamos, ventilatirig-fans, hoisting-engines, and similar ma- 

 chinery requiring high speed; and for boat and yacht engines it 

 should tind a wide application, a special valve-geai'- for reversing 

 being provided, making it available for that purpose. 



The Loomis Electric System. 



The Eureka Electric Company (Loomis system), whose ingen- 

 ious self-regulating system of electric lighting was described and 

 illustrated in these columns about a year ago, have installed many 

 important plants during the past few months. One of their most 



recent contracts is one for an installation of two thousand incan- 

 descent and several low-tension arc lamps for a large hotel at 

 Tampa, Fla. A notable feature of this installation is the fact 

 that current for both kinds of lamps will be supplied from the 

 same dynamos. Another feature of this installation is that each 

 bedroom in the hotel is furnished with a special incandescent 

 night-lamp, which can be kept burning all night, and at any de- 

 gree of brilliancy desired by the occupant of the room. 



The engines, boilers, and dynamos are placed in a separate 

 building situated some distance from the hotel. The boilers have 

 a total capacity of 250 horse-power, and supply steam to two 

 automatic high-speed engines of 110 horse-power each. These 

 furnish power for four dynamos of five hundred lights each. The 

 main switch is of special design, and controls all the lights, both 

 arc and incandescent. It is so constructed that the dynamos can 

 be run singly, in pairs, or in multiple, any desired combination 

 being made in a moment. Four main circuits run from the 

 dynamo building to the hotel through an underground conduit. 

 Each circuit is provided with an ammeter and a ground detector, 

 and each is connected, by a compound switch, with a voltmeter; 

 so that the electro-motive force of all, or of any one, or of any 

 combination of dynamos, may be quickly taken. As a whole, the 

 installation is expected to be the principal electrical feature of 

 Tampa. 



The Eureka Company have also installed a plant at Duncans- 

 ville, Penn., one-half the output of the dynamos being used for 

 arc lamps, the other for incandescent. They have also recently 

 put in plants, incandescent or mixed, in HoUidaysburg, Penn.; 

 Wakefield, Mass.; Paterson, N. J. ; Bloomfield, N.J. ; Marcellus, 

 N.y.; West New York, N.J. ; Portland, Ore. ; Little Falls, N.Y.; 

 Chester, Penn. ; Pinkney, Tenn. ; and quite a number of large 

 plants in important business buildings in this city. The growth 

 of their business has been so rapid and constant, that the company 

 have been compelled to remove their factory from this city to 

 larger and more convenient quartei-s in Brooklyn. 



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