Seen in Germany . f the melting-point of various metals—an investi-gation of the utmost importance to science and me-chanics, and as difficult as it is important — arestandard the world over. Some of these tempera-tures, recently announced, may give an idea ot theranges of temperature covered in the Reichsanstaltinvestigations. Centigrade Scale, The sun, estimated 4,800 degrees Arc light to 4,200 Platinum melts i>775 Argand lamps 1,700 to 1,900 Gold melts 1,065 Mercury boils 350 Water boils 100 Water freezes o Liquid air boils 192 The history of the scientific attempts to determinethe
Seen in Germany . f the melting-point of various metals—an investi-gation of the utmost importance to science and me-chanics, and as difficult as it is important — arestandard the world over. Some of these tempera-tures, recently announced, may give an idea ot theranges of temperature covered in the Reichsanstaltinvestigations. Centigrade Scale, The sun, estimated 4,800 degrees Arc light to 4,200 Platinum melts i>775 Argand lamps 1,700 to 1,900 Gold melts 1,065 Mercury boils 350 Water boils 100 Water freezes o Liquid air boils 192 The history of the scientific attempts to determinethe exact melting-point of gold would fill a good sizedvolume. Seven years of investigation have been givento it at the Reichsanstalt alone,and the figure abovegiven nearly approaches absolute accuracy. The work of the second department in testingthermometers and other heat-measuring devices will l82 Seen in Germany show what a practical hold the Reichsanstalt alreadyhas on the manufacturers of Germany and of the. Professor Hagen, Director of the Technical Department of the Reichsanstalt world. Director Hagen, who was for years an asso-ciate of von Helm hoitz, told me that in 1899 the A Typical Scientific Institution 183 Reichsanstalt tested over 77,000 physicians thermom-eters, sent to them by thermometer manufacturers,17,000 at the home institute and 60,000 at a branchin Ihiienau. Thousands of other thermometers ofvarious kinds were also tested. The work consists
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectgermany, bookyear1902
