CHAPTER IV 



Bunsen and Kirchhoff Spectrum Analysis Kelvin and Stokes The 

 4ooth Anniversary of Heidelberg University Bunsen Letters Kopp 

 Helmholtz. 



IN the summer of 1855 I visited the first Paris Exhibi- 

 tion in company with one of my German friends. At 

 that time there was no antagonism between the two 

 nations. Later in the same year I attended, for the 

 first time, the meeting of the British Association held 

 in Glasgow. Playfair was President of the Chemical 

 Section, and he proposed me as secretary, and intro- 

 duced me to the members as a young man of promise, 

 who might some day succeed to the sectional chair. 

 How little at that time did I think that I should be 

 President of the Association in Manchester in the 

 Queen's Jubilee year. In Glasgow I read a paper 

 containing the result of work carried on conjointly by 

 Bunsen and myself on the action of light on chlorine 

 water, for he had invited me to join him in the work. 

 It was afterwards published in the Journal of the 

 Chemical Society and in Liebig's Annalen. At this 

 meeting I made the acquaintance of many English 

 chemists, and also had the good fortune to be intro- 

 duced to Liebig, whom I afterwards visited in Munich 

 on several occasions, and from whom I received a testi- 

 monial later on when I was a candidate for the chair 

 of Chemistry at Owens College, Manchester. 



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