Economic Encyclopedia: http://kruenitz1.uni-trier.de/
Economic Encyclopedia or General System of State, City, Household, and Agricultural Management is the title of one of the most comprehensive encyclopedias in the German-speaking world. Founded by J. G. Krünitz, the work was published in 242 volumes between 1773 and 1858 and represents one of the most important German-language sources for the history of science during the transition to industrial society.
Available at Trier University Library in a searchable electronic full-text version.
See also Wikipedia article for a list of digitized volumes: https://en.wikipedia.org/wiki/Oeconomische_Encyclop%C3%A4die
Technical Dictionary in the English and German languages by Gustav Eger: https://play.google.com/books/reader?id=6S5RAAAAYAAJ&printsec=frontcover&output=reader&hl=en&pg=GBS.PA72