School hygiene . Fig. 6. CROSS SECTION OF RECKNAGELS VETILATION GAUGE 86 YEKTILATIOK .««---. Fig. 7. RECKNAGELS VENTILATION GAUGE, ATTACHED This can be prevented by not having the velocity ofthe air more than m. per second. Whether the air in the school-room is really changedthree times per hour can be ascertained by means ofEecknagels patented ventilation gauge^ (see figs. 6 1 Karl Hintrager, Eecknagels Kontrollapparat fiirVentilationsanlagen in Schulen. Zeitschrift fiir Schul-gesundheitspflege, 1895, No. 1, p. 18-23. EECKNAGELS VEKTILATIOK GAUGE 87 and 7). This consists of a support K S
School hygiene . Fig. 6. CROSS SECTION OF RECKNAGELS VETILATION GAUGE 86 YEKTILATIOK .««---. Fig. 7. RECKNAGELS VENTILATION GAUGE, ATTACHED This can be prevented by not having the velocity ofthe air more than m. per second. Whether the air in the school-room is really changedthree times per hour can be ascertained by means ofEecknagels patented ventilation gauge^ (see figs. 6 1 Karl Hintrager, Eecknagels Kontrollapparat fiirVentilationsanlagen in Schulen. Zeitschrift fiir Schul-gesundheitspflege, 1895, No. 1, p. 18-23. EECKNAGELS VEKTILATIOK GAUGE 87 and 7). This consists of a support K S (fig. 6) oneend of which is attached to the inlet grate D E F G(fig. 7) by a screw, while the other is shaped to holdtwo points. Between these the easily moyable valve F(fig. 6, cf. c, a, and b, fig. 7) is placed to receive thepressure of the incoming air. To give it any requireddegree of sensitiveness it has a compensating weightA G (fig. 6), which besides increasing the moment ofinertia makes it possible to set the apparatus so thatthe valve will be blown out 45° from the perpendicula
Size: 1347px × 1856px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublishersyracusenycwbardee
