[16] On account of the great convenience of the decimal weights and measures, and their nearly universal recognition by scientific men, we have adopted them here. The gramme = 15 grains; 5 degrees centigrade = 9 degrees Fahrenheit. [17] Pliny, Hist. Nat. (Lib. XVI, 1) expresses his pity for the "miserable people" living in East Friesland and vicinity in his day, who "dug out with the hands a moor earth, which, dried more by wind than sun, they used for preparing their food and warming their bodies:" _captum manibus lutum ventis magis quam sole siccantis, terra cibos et rigentia septembrione viscera sua urunt_. As regards the "_misera gens_," it should be said that rich grain fields and numerous flourishing villages have occupied for several centuries large portions of the Duevel moor near Bremen. [18] For further account and plans of this machine see Dingler's Polytechnisches Journal, Bd. 176, S. 336. [19] Described and figured in Bulletin de la Societe d'Encouragement, August 1857, p. 513; also Dingler's Polytechnisches Journal, Bd. 146, S. 252. [20] Berg- und Huettenmænnische Zeitung, 1859, Nr. 26. [21] Henneberg's Journal fuer Landwirthschaft, 1858, S. 42. [22] Henneberg's Journal fuer Landwirthschaft, 1858, p.p. 42 and 83. [23] Dingler's Journal, Oct., 1864. [24] Dingler's Polytechnisches Journal, Bd. 152, S. 272. See also, Knapp, Lehrbuch der Chemischen Technologie, 3te Auflage, 1., 167. [25] Der Torf; seine Bildung und Bereitungsweise, von Rudolph Gysser, Weimar, 1864. [26] Dingler's Journal, Bd. 165, S. 184.; und Bd. 172, S, 333. [27] Scientific American, Feb. 10, 1866; also, Facts about Peat as Fuel, by T. H. Leavitt, 2d Ed., Boston, p. 23. [28] Dingler's Journal, Bd. 168, S. 306, und Bd. 172, S. 332. [29] Described in Journal of the Society of Arts, 1860, p. 437. [30] Bernemann & Kerl's Berg und Huettenmænnische Zeitung, 1862, 221.