. Bacteriological apparatus : pathological, biochemical. Scientific apparatus and instruments; Bacteriology; Chemical industry. ®fjt> HtU (Eorpnraiitm, SnrljPHtpr, JJ. XjSggx. 16160-A 16160 Ovens—Drying—Vacuum—Freas' Electric. Constant temperature, elec- tric oven, constructed, heated and regulated upon same principles as the regular Freas oven, No. 16000; vacuum chamber, made of heavy cast bronze, is firmly supported in chamber of oven proper and provided with racks for shelves, with connections for vacuum and for passing stream of warm air, hydrogen or other reducing gases through chamber
. Bacteriological apparatus : pathological, biochemical. Scientific apparatus and instruments; Bacteriology; Chemical industry. ®fjt> HtU (Eorpnraiitm, SnrljPHtpr, JJ. XjSggx. 16160-A 16160 Ovens—Drying—Vacuum—Freas' Electric. Constant temperature, elec- tric oven, constructed, heated and regulated upon same principles as the regular Freas oven, No. 16000; vacuum chamber, made of heavy cast bronze, is firmly supported in chamber of oven proper and provided with racks for shelves, with connections for vacuum and for passing stream of warm air, hydrogen or other reducing gases through chamber; front, on which rests the door, is heavily re- enforced, as is the door, to give substantial bearing and produce perfect vacuum-tight connection; central part of door and back of chamber are constructed of a cast grid, on which rests a mica plate, made vacuum-tight with its frame, thus allowing inspection of vacuum chamber by means of electric lamp at back of oven beyond vacuum chamber; ground surfaces of the vacuum chamber and its door, in the small size oven, are held together by sturdy spring clips until vacuum pump is started, the reduced pressure then holding the door in a very firm and air-tight condition; this construction allows instant removal of the door and permits bearing surfaces to be easily and accurately reground, in case of need, by simply revolving the door by means of two handles provided thereon; door of large size oven can be rotated in a swivel holder, which swings on the hinges; vacuum chamber of small size oven is provided with four perforated metal shelves; oven proper is provided with two perforated aluminum shelves and equipped with cast aluminum racks, permitting shelves to be placed at any height desired when vacuum chamber is removed; vacuum chamber of large size oven is provided with cast ribs on the sides to accommodate up to ten shelves, six being furnished; this oven, because of its substantial construction, comparatively large size an
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscientificapparatusa
