40 JOURNEY TO ENGLAND. 



acid arid the plate then coated afresh with iron. This 

 made my nickelizing worthless for this purpose. A few 

 years later it was again discovered and made known 

 by Professor Bottger. but has only in recent times 

 been much employed in industrial operations. 



The second discovery consisted in the application 

 of the zinc printing to a rotating fly-press, which process 

 had just then come to be known. With the help of a 

 skilful mechanician, the watch-maker Leorihardt. I had 

 prepared a model of such a press, which very satis- 

 factorily executed the necessary operations for producing 

 lithographic impressions from a cylindrical zinc plate. 

 But it subsequently turned out on its employment on 

 the large scale by William in England that zinc printing 

 allowed of no rapid repetition of impressions. After 

 from 150 to 200 impressions the work had to be 

 interrupted for a pretty long time, or else an obliteration 

 of the reprint on the cylinder took place. 



When my brother in England met with these 

 difficulties I obtained a six week's furlough and visited 

 him in London, w r here he had rented a small place 

 for our experiments in a narrow lane of the City near 

 the Mansion House. Despite the most strenuous efforts 

 we could not however succeed in overcoming the diffi- 

 culties. We succeeded indeed in obtaining re-impressions 

 from even century old prints by a regenerating process 

 by continuous heating, if I remember rightly, in a 

 solution of salts of barium arid our process, to 

 which we had given the grand name "anastatic prin- 

 ting", accordingly excited in England much attention 



