. Bulletin de l'Académie des Sciences de Californie du Sud. La science ; natural history ; histoire naturelle. records. Probablement le meilleur des modèles américains à de telles fins sont ceux qui sont conçus et utilisés par le Weather Bureau. Ils sont légers et compacts en forme et lorsqu'ils sont en suspension dans une position droite- et placés là où ils ne sont pas assujettis à une mauvaise manipulation ou une vibration, leurs dossiers sont satisfaisants. L'Angleterre est le plus léger de l'atmosphère supérieure, et l'Allemagne, météorographe avant la guerre mondiale, fabriqués le plus durable instrument de ce personnage. Description de l'hythergraph hythergr-L

• Contributeur: Book Worm
• ID de l’image: RGD1WH
• Taille du fichier: 7,2 MB (541,1 KB Téléchargement compressé)
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• Dimensions: 2465 x 1014 px | 41,7 x 17,2 cm | 16,4 x 6,8 inches | 150dpi

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. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. records. Probably the best American models for such purposes are those designed and used by the Weather Bureau. They are light in weight and compact in form and when they are suspended in an up- right position and placed where they are not subject to rough handling or vibration, their records are satisfactory. England has the lightest upper-air meteorograph, and Germany, before the World War, manu- factured the sturdiest instrument of this character. Description of the hythergraph—The hythergraph is a new de- parture in a meteorological recording apparatus. It is one-third the size of any other registering instrument of similar purpose and weighs from one-half to one-fourth as much. This compact design permits registration of two or more sets of conditions over a considerable period. These conditions can be readily interpreted at a glance and inspected any time during the process of registration. This is ac-. PLATE NO. 1. OUTSIDE VIEW OF HTTHBRGRAPH (Half Actual Size) Thermographs and hygrographs have been available for more than a .score of years. It has been heretofore, impracticable to use them in a num- ber of situations because of their bulk and absence of portability. Owing to their construction the recording ])ens are in constant contact with the sheet making a continuous record, tlius the instruments cannot be moved without making the record illegible. In the hythergraph the pen is on the sheet less than a minute's time; this makes it possible to use it in airplanes, balloons and on all kinds of aircraft generally. Besides being small (4x8x1% inches) and light (weight 3 pounds) it is flat and indicates the temperature on one side and the humidity on the other. A dual record is made possible by the use of a con- tinuous band of recording paper feeding over two rollers placed at such a distance from each other that the records can be readily seen. complished

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