382 BROTHERS AND SISTERS. 



Of my brothers Hans and Ferdinand, who became 

 agriculturists, Hans afterwards devoted himself to agri- 

 cultural engineering, and undertook a spirit distillery 

 in Mecklenburg. That certainly did not bring much 

 grist to his mill, but gave him the opportunity of 

 falling in love and getting engaged. After his marriage 

 he acquired with my assistance a bottle manufactory 

 near Dresden, which he managed till his death in the 

 year 1867. Ferdinand still lives on his manor of 

 Piontken in East Prussia. He was again betrothed in 

 1856 and then married; one of his two daughters is 

 the wife of my son William, and some years ago 

 presented me with the first grandson. 



My brother Frederick had in the fifties actively 

 participated in William's efforts to improve his re- 

 generative steam-engine and evaporating apparatus. 

 In the year 1856 he hit on the happy idea of employing 

 the regenerative system, hitherto but little successful, 

 for metallurgical purposes, and in particular for rever- 

 beratory furnaces. A number of patents, which he 

 took out in different countries, partly alone, partly 

 in conjunction with William, for a perfected form of 

 regenerative gas-furnaces, formed the basis of a furnace- 

 building business established by William and himself. 

 To work this in Germany and Austria, he transferred 

 his residence to Berlin, shortly after his marriage in 

 1864. In 1867, after the death of our brother Hans, 

 he took over the glass-works near Dresden, and by his 

 technical gifts and energy soon raised the same into 

 a model factory for glass manufacture. Through the 



