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[Entered at the Posi-Offlce of New York, N.Y., as Second-Class Matter.] 



A WEEKLY NEWSPAPER OF ALL THE ARTS AND SCIENCES. 



Seventh Year. 

 Vol. XIII. No. 327. 



NEW YORK, May 10, li 



Single Copies, Ten Cents. 

 ^3.50 Per Year, in Advance. 



THE WESTERN ELECTRIC INCANDESCENT LIGHT- 

 ING SYSTEM. 



Although it has not the capacity of the arc system for produ- 

 cing large lights, and is inferior to it in economy, the incandescent 

 light demonstrates daily its ability to compete successfully with 



soft iron, and pole-pieces are cast upon the upper ends of the cores. 

 The lower ends of the cores are bolted to the cast-iron base : there 

 are therefore only two magnetic joints in the whole system. 



The type of field-magnet frame used in their well-known arc- 

 lighting system is not used for this incandescent apparatus ; but a 

 simpler form, and one better adapted to this class of work, has 



FIG. I. — END VIEW OF INCANDESCENT DYNAMO OF WESTERN ELECTRIC COMPANY. 



gas and other systems of lighting, and has supplanted gas for pur- 

 poses of general illumination in many places. 



Figs. I and 2 illustrate a complete dynamo as made for the in- 

 candescent system of the Western Electric Company, while Fig. 3 

 shows a field-magnet and pole-pieces only. The whole iron base 

 is cast in one piece. The cores of the field-magnets are made of 



been adopted. The peculiar form of the cast-iron base results in 

 bringing the armature-shaft at a convenient height from the floor, 

 but not so high as is usually the case in dynamos having this type 

 of field-magnet, while at the same time it permits the use of the 

 sliding carriage for adjusting belt-tension without raising the 

 dynamo or rendering it unstable. The field-magnet coils are con- 



