BAIRD &TATLOCK (LONDON) LTD. 



PARAFFIN WAX 



5263 



5263 T Standard Cadmium or Weston Cell. The latest portable H pattern has been adopted, 

 and gives an E.M.F. of 1.018 volts at 15 C. The temperature co-efficient is so low as 

 to be negligible for all except research work of the highest order, being about .0035 per 

 cent, per degree C. ; no thermometer is therefore fitted. Price of single cadmium cell 

 in improved case . . . . . . . . . . . . . . . . 1 15 



5264 T Double Cadmium Cell, as above . . . . . . . . . . . . 2 10 



(Certificate of the E.M.F. of any of the above can be furnished by the National Physical 



Laboratory at a charge of 5/- per cell.) 



5265 1 Single Cadmium Cell, unmounted . . . . . . . . . . . . 15 



5266 T Stand of Five Cells, complete with H glass tubes, platinum wires, with seven plugs, so 



that either the whole series or any single cell can be used . . . . 1 12 



5267 



5270-5271 



5267 T Pair of Half Cells, with stand and cylinder as figured. Price complete, but without 

 electrodes 



5268 T Glass cells only . . 

 5269 1 Stand only 



Glass Trough, for mercury, for easily filling tubes, etc. 



5270 Diameter of top, 4 in., total height, 8J by 2 in. diameter of body 



5271 s in., 7 by i in. 



each 



15 

 020 

 056 



029 

 036 



ICHEMICAL AND SCIENTIFIC APPARATUS AND PURE CHEMICALS. 



955 



