CIENCE 



LEntered at the Post-OSflce of New York, N.Y., as Seooncl-Clas3 Matter.J 



A WEEKLY NEWSPAPER OF ALL THE ARTS AND SCIENCES. 



Eighth Year. 

 Vol. XV. No. 361. 



NEW YORK, January 3, 1890. 



Single Copies, Ten Cents. 

 ^3.50 Per Year, in Advance. 



MODEL ELECTRIC ELEVATOR INSTALLATION. 



We present in this issue a view of a recent model hydraulic ele- 

 vator installation made at the building of the United Security, Trust, 

 .and Safe Deposit Company of Philadelphia by the Otis Elevator Com- 

 pany of Yonkers, N.Y., and Chadbourne, Hazleton, & Co. of Phila- 

 delphia, agents in Pennsylvania for the Sprague Electric Railway 

 and Motor Company. 



One of the first things which strikes an observer is the minimum 

 of space required for every part of the installation. The pump was 

 manufactured by the Otis Elevator Company specially for this 



proved satisfactory in this capacity, and the Sprague motor was 

 substituted. 



This motor is now giving perfect satisfaction, and the plant is 

 one of the finest elevator plants in Philadelphia. Our view is made 

 from a photograph, and shows all the details of the installation. 



THE WORLD'S MEAT CONSUMPTION, PRODUCTION, 

 AND TRADE. 

 The average consumption of meat in the world, says a recent 

 number of the Journal of the Society of Arts, London, has in- 



A NEW ELECTRIC ELEVATOR. 



plant, and the arrangement for reduction of speed between the 

 armature-shaft and the pump is made in the compact manner 

 shown in the illustration. The motor operates the pump against 

 a pressure in the tank, there being no overflow ; and when the 

 maximum pressure is reached, the motor runs empty, automatically 

 cutting down the amount of electric current taken from the line, so 

 that only sufficient current is used to supply enough energy to keep 

 the motor in revolution. 



Before the installation of the electric motor at this place, a gas- 

 engine v.-as used to supply the necessary power ; but gas never 



creased ; but, on the other hand, the world's commerce in meat 

 has declined. Germany's imports of meat declined from §94,450,- 

 000 in 1S78, to $73,700,000 in 1887, while the exports declined from 

 §88,300,000 to 833.900,000. In France, between 1S79 and 1S87, 

 imports diminished from §82,300,000 to $53,910,000. while exports 

 inci eased from $35,950,000 to $52,600,000. In England, where ex- 

 ports of meat are insignificant, the imports decreased from $240,- 

 000,000 in 18S0, to ^215.000,000 in 18S7. On the other hand, the 

 British colonies exported largely : for example, from Canada the 

 exports increased from $4,430,000 in 1879, to $30,000,000 in 1887. 



