CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 



71 



No. 1040. 



No. 1042. 



No. 7698. 



BATTERIES, Cenco Portable Storage. These batteries are of the same general type as the Cenco 

 Storage Batteries described on the preceding page, but are especially m^de to stand transporta- 

 tion. Under ordinary conditions they should last for at least five years, and they are guaranteed 

 for one year against everything except abusive handling. The jars are of the best vulcanite, and 

 are enclosed in hardwood cases provided with a handle and finished with acid-proof paint. 

 Strength is added to the jar when placed in the case by entirely surrounding it with an elastic 

 sealing compound. Short circuiting is prevented by an exceptionally wide distance between 

 the plates. The acid cannot spill under any ordinary conditions of service. Batteries are 

 charged ready for use. Initial E. M. F., 6 volts. 



No A B C D 



Output at normal discharge rate, ampere 



hours '40 60 80 120 



Charging rate, amperes 4% 6 7 8% 



Discharge rate for 8 hours, amperes 5 7% 10 15 



Length, inches 8% 10 -' ' 11 14% 



Width, inches 6 714 



Height, inches 9 9*4 9^4 9'/4 



Weight of cell, complete with electrolyte, Ibs 23 



1040. COMPLETE CELL, charged $14.30 



35 

 17.50 



45 

 25.75 



66 

 31.25 



BATTERIES, Cenco Sealed Storage. These batteries are contained in glass jars, sealed with a 

 smooth and strong compound, and are ideal for isolated and portable work where care in hand- 

 ling may be given. They are especially desirable for clock and bell systems, and for demonstra- 

 tion work. Each cell is made up with a negative plate on either side of the positive, giving 

 equal action on each side and preventing buckling and sulphation. The sealing compound pre- 

 vents evaporation of the electrolyte and keeps the cell clean at all times. The batteries are 

 shipped completely assembled and charged ready for immediate use. Initial E. M. F., 2 volts. 



No. 



Output at normal discharge rate, ampere 



hours 



Charging rate, amperes 



Discharge rate for 8 hours, amperes 



Length, inches 



Width, inches 



Height, inches 



Weight of cell, complete with electrolyte, Ibs 



1042. COMPLETE CELL, charged 



8 



1 J A 



l 



4 



2% 



16 



2% 



2 



4 

 2% 



10 

 3.50 



11 



4.40 



36 



5 

 4% 



ey* 



3 



15 



22 



7.00 



D 



56 



8 



7 

 6*4 



3 



15 

 24 

 8.60 



7698. BATTERY TESTER, or Syringe Battery Hydrometer. A very convenient form of battery 

 hydrometer, which eliminates the spilling o acid when making a battery test. The pointed tuba 

 is inserted into the battery and the electrolyte drawn up into the hydrometer containing tube 

 by means of the rubber bulb. After the reading is obtained the fluid is ejected back into the 

 battery. Complete table showing relation between specific gravity and battery strength in- 

 cluded 1.00 



7699. HYDROMETER onlv of No. 7698. 



.45 



