. Transactions of the American Philosophical Society. os or other reagent, could be pushedthrough the small iron pipes. Thermometers were placed in the side necks B, the arrow to represent the direction of flow of the gas current throughthe gas tubes, the metal-coated asbestos was, in the experiments, placed at the EE8EARCHES UPON THE CHEMICAL PROPERTIES OP GASES. 155 point D, and of the two thermometers E was kept a few degrees higher than F, thepurpose being to have the gas heated nearly to the temperature of the hottest partof the oven before it reached that point. Thus it was n

---

. Transactions of the American Philosophical Society. os or other reagent, could be pushedthrough the small iron pipes. Thermometers were placed in the side necks B, the arrow to represent the direction of flow of the gas current throughthe gas tubes, the metal-coated asbestos was, in the experiments, placed at the EE8EARCHES UPON THE CHEMICAL PROPERTIES OP GASES. 155 point D, and of the two thermometers E was kept a few degrees higher than F, thepurpose being to have the gas heated nearly to the temperature of the hottest partof the oven before it reached that point. Thus it was not possible for the gas streamto exeit a cooling effect upon the metal-coated asbestos. This ajjparatus is superiorto an ordinary sheet-iron oven, as the glass tubes are heated by actual contact ratherthan by radiation. Repeated trials have shown that if a thermometer be inserted inthe side neck, and a second one in one of the long, horizontal iron tubes, the differ-ence in the indications of the two thermometers will amount only to an insignificant. B „{ D ;;

---

Size: 1925px × 1299px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookauthorj, bookidtransactionsofa171893amer, booksubjectscience