ELECTRICAL MEASURING INSTRUMENTS 



INDICATING Electrical Measuring Instruments be known whether each is doing its share of the work 

 are of even more importance to the electrical and not becoming strained or damaged by "over- 

 engineer than is the action of the human pulse load." This type of meter also facilitates an econom- 

 to a phy.sirian, and upon the use of such devices ical control of feeder circuits by indicating to the 

 entirely depends the knowledge of an electrical plant's operator the branches of the building that are un- 

 action. necessarily taking current. 



To avoid danger, the Voltmeter must always be Of course when the functions of these instruments 



relied upon for throwing two generating sets in are thoroughly understood to be so essential to tin- 



parallel, and it is the only guide the operator has for successful, economical and uninterrupted operation 



maintaining a steady light throughout the entire of the plant, an engineer will select the very best 



building. This instrument is always referred to for apparatus the market affords. The choice of Weston 



determining whether the electric lights are burning Electrical Measuring Instruments has given the Singer 



at their rated efficiency, and shows the direct relation 

 of coal bills to renewal of lamps. 



The Ammeter has a very important duty in 

 detecting the amount of current (or "load") on any 1 percent, of the actual instantaneous values of voltage 

 generating set or distributing device, so that it may and amperage that obtain. 



Building the benefit of the world's highest achieve- 

 ment in the art of electrical measurement, and allows 

 the engineer of that plant to know at all times within 



RUBBER PRODUCTS 



R 



UBBER, too, has played its part in the con- 

 struction and equipment of this edifice. It 

 has furnished its invaluable assistance in 

 many ways. 



Without rubber suction hose and rubber steam 

 hose, the excavations for the foundations would have 

 been practically impossible. Rubber discharge hose 

 has been necessary to convey water from one point 

 to another. None of the pneumatic hammers, thou- 

 sands of which were daily employed in riveting the 

 vast structure together, could have been nearly so 

 promptly and efficiently handled without rubber 

 pneumatic hose. 



Many people do not know that the best rubber 

 is grown directly under the equator, where the fierce 

 beams of the tropical sun develop the caoutchouc 

 or rubber tree. The torrential rains of the wet 

 season in the tropics have also much to do with 

 fostering its growth and development. 



The crude sap is gathered by puncturing the tree 

 at intervals around its greatest girth and collecting 

 the sap, as it exudes, in little cups. Afterwards this 

 is hardened by being smoked over a fire of nut 

 indigenous to the same soil. This nut will not 



flame or blaze when lighted, but produces a thick and 

 heavy smoke, which when brought into contact with 

 the rubber milk coagulates it and renders it fit for 

 transportation. 



As one departs from the equator, rubber still 

 grows, but the qualities are poorer and poorer, until 

 they are nearly resins. 



The use of this commodity is so extended that, 

 independent of the purely mechanical devices in 

 which it forms a part, goods of an ornamental and 

 elegant nature, too, are made from it. 



Among its latest developments is a rubber floor 

 covering, or tile, made up as burned china tiling 

 is made, of a number of different colored pieces, 

 of different shapes, to represent any design. This 

 forms a most beautiful floor covering durable, 

 sanitary, non-slippery, and much more desirable for 

 the purpose than anything yet devised. 



The elevator cars in the Singer Building are 

 furnished with it, from designs supplied by the 

 CkMa Percha & Rubber Manufacturing Co. of No. 126 

 Duane Street, New York, who also supplied the 

 other rubber material used in the construction and 

 equipment of this building. 



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