‎"JÜRGENSEN, URBAN.‎
‎Beskrivelse over et nyt Metal-Thermometer.‎

‎(København, 1823). 4to. Bound uncut in recent marbled paper covered boards. Published in ""Videnskabernes Selskabs Skrifter"". Fine and clean. (3), 284-288 pp. + 2 engraved plates. ‎

Reference : 63106

‎First appearance of Jürgensen’s description of his metal-thermometer Jürgensen ”starts the article by applauding the mercury thermometer and calls it one of the most perfect instruments in the world of natural sciences. The metal thermometer is however, he states, much more portable and rugged than the former. This new design included an arrangement that allows the user to observe the lowest temperature since the last resetting of the hand. Moreover, the metal thermometer is more dependable in conditions where the temperature is well below nil degrees, as the mercury may freeze in such an environment. The thermometer described in this article is of a slightly larger size than the first iteration and thus meant as a stationary tool for better readability. Jürgensen goes on to describe the construction of the thermometer, using two illustrations – one of the front and one of the back of the device.” (Insight: Urban Jürgensen and the Royal Danish Academy of Sciences and Letters).‎