MORSE. 



SPECTRA OP WEHNELT. 



529 



STRONTIUM. 



Spark. Strontium chloride on carbon electrodes. 



Arc. Strontium chloride on carbon electrodes. 



Wehnelt. Platinum point in solution of strontium chloride. (Plate 1, Fig. 5.) 



Wehnelt spectrum of strontium there are diffuse bands in the yellow and 

 yellow-green with maxima which seem to correspond closely with sharp 

 lines in the spark spectrum. Whether or not greater dispersion will 

 show these to be really bands witli heads in the same places as are occu- 

 vol. xxxix. — 34 



