was indispensable to us for visit- through the draught of the 78 foot chimney of the fac- tory. Thus the hot air, coming from above, becomes Dry plates are plates of glass covered with an emul- ing his factory, as alone we should not have dared to charged as it descends with the moisture produced… … paratus (Fig. 4) consists of three parts. The Fig. 2—DRYING ROOM. must be taken to stir the emulsion with a long lowermost of these extends beyond the level of glass rod, and to the table, and car- eontinue’ the ries six grooves, boiling for from and sheets of fifteen to twenty fluted paper…
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