Morrow — On the Influence of Self- Induction, ^c. 

 Principal Lines of Nitrogen. 



611 



Chlorine. 



Chlorine was prepared from manganese dioxide and hydrochloric acid. 

 Tlie gas was washed by being allowed to bubble through water, and 

 dried by pumice moistened with sulphuric acid, and sulphuric acid alone. 



The spark-gap had to be made much narrower so that the current 

 would pass, as it would not do so when the electrodes were placed the 

 usual distance apart. Many chlorine lines show in the spectrum, and 



