BAIRD &TATLOCK (LONDON) LTD. 



JB 



5342 

 5342 s Ostwald's Slide Metre Bridge, i metre long, platinum iridium wire 



.. 1 15 6 



5343 

 5343 s Wheatstone Bridge, wire i metre long, scale 0-50 cm. twice, mounjted on frame with jockey 15 



5344 



5344 s Kohlrausch Universal Bridge, as illustrated 



5345 s Kohlrausch Universal Bridge, as illustrated, but fitted with coil 



This type of bridge is very convenient as the resistance can be read off on a scale in ohms direct without 

 reference to a table of value. 



The Rheostat contains 5 comparative coils of o.i, I, 10, 100, 1,000, and the bridge is suitable for resistance 

 measurements on solid conductors between about 0.05 and 20,000 ohms with sufficient accuracy for most technical 

 purposes. By using the alternating current of the small induction coil fitted with the instrument, and substituting a 

 suitable telephone for the galvanometer, the resistance to earth, of earth connections and the internal resistance 

 of cells can be determined. 



8 15 

 10 15 



' 



5346 





5346 s Lamp Resistance, so arranged that the lamps can either be used in parallel or series, on 

 mahogany board, fitted with cover, with plugs for six lamps. Price, without lamps 



(The resistance can be varied according to the candle-power of the lamp.) 



250 



iCHEMICAL AND SCIENTIFIC APPARATUS AND PURE CHEMICALS- 



