| Cat 
        No. | Description | 
      
        | 305 | Students  Kelvin  Bridge | 
      
        |  | 
      
        | 306 | Calender and Griffth bridge (for measuring resistance of Thermometers)
 | 
      
        |  | 
      
        | 307 | - do -  special  mercury  contact  type | 
      
        |  | 
      
        | 308 | Platinum  Resistance  Thermometer   in 
        corning  glass tube | 
      
        |  | 
      
        | 309 | Anderson's  Bridge 
        for measurement of inductance, Constantan Coils | 
      
        |  | 
      
        | 310 | -do-  Manganin  Coils | 
      
        |  | 
      
        | 311 | De -Sauty's bridge for comparasion of 
        the  capacitances of condensers | 
      
        |  | 
      
        | 312 | Rayleigh Bridge  for determining the 
        self Inductance of a coil | 
      
        |  | 
      
        | 313 | Maxwell Bridge | 
      
        |  | 
      
        | 314 | Wein's Bridge for capacitance 
        measurement. | 
      
        |  | 
      
        | 315 | Carry Foster Bridge | 
      
        |  | 
      
        | 316 | Schering  Bridge | 
      
        |  |