April 3, 1891.] 



SCIENCE. 



195 



duced. The armature is mounted upon a brass face-plate, which 

 is first turned perfectly true, and after completion the armature is 

 carefully balanced, so that when run at full speed the motion is 

 hardly perceptible. The bearings are all of the self-oiling type, 



which do not require attention oftener than once in two to four 

 weeks. 



In the regulator, the arrangement of contacts in the switch on 

 top is such that both the field and armature of the motor are 

 chai'ged by the single operation of turning the knob, making it 



impossible to put the current on the armature before the field is 

 charged, which has often been the cause of the burning-out of mo- 

 tors by the use of ordinary regulators. The field is first charged 

 through a small resistance-coil, which is put in for the purpose of 

 preventing a too sudden change in the magnetic strength of the 

 latter, as well as to divide the spark when the motor is discon- 

 nected. The coils used for starting the armature are all of the 



FIG. 3. 



same size wire, carefully tried for carrying the full current of the 

 machine at all speeds. With the fire proof regulator, the motor 

 can therefore be slowed down and left running at any desired 

 speed indefinitely; and the usual caution. " nerer to leave the 

 box half turned on for fear of overheating and fire," is unneces- 

 sary. The capacity of these boxes is stamped upon them also, as 

 it is on all apparatus made by the company. 



In dyspepsia the stomach 

 fails to assimilate the food. The 

 Acid Phosphate assists the 

 weakened stomach, making the 

 process of digestion natural and 

 easy. 



Dr. E. S. McCoMB, Philadelphia, says: 



' ' Used it in nervous dyspepsia, with suc- 

 cess." 



Dr. "W. S. Lbonaed. Hinsdale, N. H., 

 says : 



" The best remedy for dyspepsia that ha 

 ever come under my notice." 



Dr. T. H. Andrews, Jefferson Medical 

 College, Philadelphia, says : 



"A wonderful remedy which gave me 

 most gratifying results in the worst forms of 

 dyspepsia' ' 



Descriptive pamphlet free. 



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