Journal . s of the wooden frames;/. g, ii pass freely. These frames swing on pins restingon the bottom of the- box. The wooden frames inturn support the stoneware funnels //, /(, It. The upperends of the necks of these funnels have projectingportions or ears which rest on the movable pegs i, i,working at different heights in the sides of the frames. The ears of the funnels slide up and downin grooves, so as to keep the funnels in position whenbeing raised or lowered from one level to these means the mouth of the funnel may I eplaced over a shallow basin, or raised so as to accom-mod
Journal . s of the wooden frames;/. g, ii pass freely. These frames swing on pins restingon the bottom of the- box. The wooden frames inturn support the stoneware funnels //, /(, It. The upperends of the necks of these funnels have projectingportions or ears which rest on the movable pegs i, i,working at different heights in the sides of the frames. The ears of the funnels slide up and downin grooves, so as to keep the funnels in position whenbeing raised or lowered from one level to these means the mouth of the funnel may I eplaced over a shallow basin, or raised so as to accom-modate a tall-necked rlask, as occasion requires. Acontinual current of air passes up through the funnels,carrying off the fumes from the vessels beneath them,so that the fumes from one vessel are entirely cut offfrom the neighbouring vessels. The funnels andframes can be swung back to the position shown attin right hand of Fig. 4, and may be held thereby the wooden catch /?. This enables the worker to —*. perform conveniently any operation, such as fillingup the vessel or stirring its contents without takingit away from the bath. The door /, /, swinging onleather hinges, gives access to the interior of thechamber, and permits of the frames and funnels beingremoved bodily by simply withdrawing the support-ing pins on which they swing. No condensationtakes place either in the funnels, the frames or thedraught box, unless the draught is insufficient, or thesteam is allowed to escape from the steam-bath muchmore freely than is necessary. Even in these casescondensation only takes place in winter, if the tem-perature of the laboratory be allowed to fall uncom-fortably low. In any case the condensed drops donot fall into the evaporating vessel. Figs, (i and 7 give a front and birds-eye view of anarrangement for supplying the laboratories withwater at a high and constant pressure. The pressureat which the water is supplied by the street main isliable to daily and hourly variation, and
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
