No. 2446 



Our Line of 



Electrical Apparatus 



is constantly being added to and is thoroughly worth 



considering when additions to the equipment of the 



COLLEGE OR UNIVERSITY LABORATORY 



are being contemplated. 

 SEND FOR CATALOG K 



No. 2446 Resistance Box and Bridge Combined is an exception- 

 ally high grade box of the finest materials and first class workmanship. The 

 blocks are of new and improved design which enables the coils to be held 

 more firmly in position, and lessens, the danger of imperfect contact between 

 coils and blocks. The total resistance of the rheostat is 1 1, 1 10 ohms, and the 

 bridge coils are eight in number, I, 10, 100 and 1000 ohms on each side. All 

 coils are guaranteed to T ^ of I % 



The binding posts for battery, galvanometer, and unknown, and keys 

 with platinum contacts for battery and galvanometer are conveniently placed, 

 and all hidden connections are clearly indicated by lines on the top of the box. 



With two traveling plugs, Net, $36.00 



IMPORT ORDERS 



We wish to call attention to our superior facilities for " Duty Free" Im- 

 portation, as with the mechanical experience obtained through our own shop 

 combined with our expert knowledge of proper designs and the personal ac- 

 quaintance of all of the responsible European firms, we can give our customers 

 the best service obtainable at reasonable rates. We invite correspondence be- 

 fore you place your orders. 



Central Scientific Company 



345 to 359 West Michigan St. 



CHICAGO, ILLINOIS 



