BAIRD &TATLOCK (LONDON) LTD. 



B5256 



5257 5258 



B5256 T Electrometer Key, for use with the preceding electrometers, 

 and mounted on a heavy foot 



5259 



The key is well insulated 



approximate 



5257 1 Platinum Anode, as Fig. A 

 5258 1 Platinum Cathode, as Fig. B . . 



5259 1 Capillary Electrometer (Ostwald's), mounted on inclinable stand with scale, complete 

 with platinum wires. Fill electrometer as follows : pour pure dry mercury into Limb A 

 of electrometer, also half fill the bulb of the other limb with mercury and the rest of 

 the tube with dilute sulphuric acid (i part by volume of acid to 6 of water) 



13 



3 5 



10 



17 6 



5260 5261 5262 



5260 1 Capillary Electrometer Tubes, after Ostwald, with platinum wire in bulb . . . . 02 



526 1 T Capillary Electrometer Tubes, 020 



5262 1 Stand with H Tube, for fitting with the cadmium normal elements, complete with platinum 



/irAC 



wires 



050 



CROSS STREET HATTCTNT GARDE1ST, E-C 



954 



