Tlic Unpublished Papers of J. J. Lister. 



33 



Although tlie present belated puhlicjition cannot secure to Lister the 

 priority which he forfeited by refraining from timely publication, it is 

 to be hoped that it will cause him to be included in tlie illustri(jus list 

 of English Amateurs who have made notable contributions to science. 



As another proof — if such could be needed— of the grasp of his sul)- 



Yi^ ay. 





Fig. 3. 



ject in all its aspects, attention is called to this diagram (fig. 3] repro- 

 duced, like all the others, in exact facsimile of the original sketch. It 

 shows a number of absorption-spectra of coloured glasses, plotted exactly 

 as is done now in physical laboratories. But these date from the 

 forties of last century, decades before spectrum-analysis became known ! 



A. E. CONRADY.] 



Vel. 19th, 1913 



D 



