1862.] 



on Mauve and Magenta, 



483 



in the elaboration of truth. It was in the same spirit that his suc- 

 cessors continued the work. Patiently they elicited fact after fact ; 

 observation was recorded after observation ; it was the labour of love 

 performed for the sake of truth ; ultimately, by the united efforts of so 

 many ardent inquirers, exerted year after year in the same direction, 

 the chemical history of benzol and its derivatives had been traced. The 

 scientific foundation having thus been laid, the time of application had 

 arrived, and by one bound, as it were, these substances, hitherto exclu- 

 sively the property of the philosopher, appear in the market-place of life. 

 Need I say any more ? The moral of Mauve and Magenta is trans- 

 parent enough. I read it in your eyes, — we understand each other. 

 Whenever in future one of your chemical friends, full of enthusiasm, 

 exhibits and explains to you his newly-discovered compound, you will 

 not cool his noble ardour by asking him that most terrible of all questions, 

 " What is its use ? Will your compound bleach or dye ? Will it shave ? 

 May it be used as a substitute for leather ? " Let him quietly go on with 

 his work. The dye, the lather, the leather"will make their appearance 

 in due time. Let him, I repeat it, perform his task. Let him indulge 

 in the pursuit of truth, — of truth pure and simple, — of truth not for the 

 sake of Mauve, not for the sake of Magenta— let him pursue truth for 

 the sake of truth ! r^, y^^ H.] 



Illustrations of Aniline Colours. 

 Mauve. 





Magenta. 



New Purple. 



