‎"COLDING, A.‎
‎Resultaterne af nogle Iagttagelser over forskjellige Fugtigheds=forhold i Omegnen af Kjøbenhavn. Foredrag, holdt i det Kgl. Landhuusholdningsselskab den 14de Marts 1860. Særskilt Aftryk af Tidsskrift for Landoekonomi. - [PRESENTATION-COPY]‎

‎Kjøbenhavn, Thiele, 1860. Small 8vo. Contemporary wrappers with black cloth back-strip. Orig. title-page pasted on to front wrapper. Presentation-inscription (fra Forfatteren) shaved. Ex-library copy with two stamps to title page. A nice and clean copy. (2), 22 pp.‎

Reference : 38773

‎Rare first edition, presentation-copy ""fra Forfatter"" [i.e. from the author] on front wrapper, of Colding's observations concerning dampness in Copenhagen and surroundings.The present work is based on Colding's experiences and observations during his years as state-engineer. The water supply in Copenhagen was largely built upon the accumulation on the thaw drain in spring, hence his studies on evaporation in lake Peblinge and lake Damhus in Copenhagen. During the 1850' ies Colding initiated drillings in the catchment area of lake Damhus. These drillings created the foundations for The Copenhagen Waterworks. Ludvig August Colding (1815 - 1888) was a famous Danish engineer and physicist. He was originally educated as a carpenter but graduated as mechanical engineer in 1841. In 1845 he became water-inspector in Copenhagen and in 1847 he was also given the responsibility of the gas- and waterworks. Together with the famous chemist Julius Thomsen, he proved that the cholera spread throughout Copenhagen through the drinking water (1853) - a most significant discovery. After this he was responsible replacing much of the sewer-system of Copenhagen. In 1857 he became state engineer. During this period he overhauled the desperately inadequate water and sanitation system. ‎