NCE 



LBntered at the Post -Office of New York, N.Y., as Second-Class Matter. J 



A WEEKLY NEWSPAPER OF ALL THE ARTS AND SCIENCES. 



EiOHTH Year. 

 Vol. XV. No. 383. 



NEW YOEK, June 6, 1890. 



Single Copies, Ten Cents. 

 $3.50 Per Year, in Advance. 



NEW SERIES OF PORTABLE TESTING AND RESISTANCE testing. They will be found adapted to the location of faults in 



telegraph and electric-light lines, determination of armature and 

 field resistance of dynamos and motors, and the needs of govem- 

 We print to day a description, with cuts, of a new series of ment and other inspectors, as well as to general expert work. 



portable testing and resistance sets. These sets were all designed The set shown in Fig. 1 is the most complete of the series, and 



SETS. 



FIG. I. 



FIG. 2. 



FIG. 3. 



in the laboratory of Messrs. Queen & Co., Philadelphia, and are 

 intended to meet the requirements of electric light men, telephone 

 line construction, dynamo and motor manufacture, and general 



is intended for all kinds of work where considerable accuracy is 

 required. The coils in this set are, as is seen from the figure, 

 arranged in four rows, each row being made up of ten coils of the 



