. Elementary chemical microscopy . Fig. 149. Behrens Method of Filtration. A little practice is required in order to apply the proper pressure of the glass tube upon the filter paper and to maintain this pressure uniformly without tipping the tube out of its vertical position. The chief difficulties encountered in rapid work are: (1) The danger of carrying the filtrate up into the mouth or into the rubber tube by air bubbles, which are always drawn into the tube when the liquid to be filtered has all been absorbed by the filter paper and sucked into the tube, and (2), it not infrequently happe
. Elementary chemical microscopy . Fig. 149. Behrens Method of Filtration. A little practice is required in order to apply the proper pressure of the glass tube upon the filter paper and to maintain this pressure uniformly without tipping the tube out of its vertical position. The chief difficulties encountered in rapid work are: (1) The danger of carrying the filtrate up into the mouth or into the rubber tube by air bubbles, which are always drawn into the tube when the liquid to be filtered has all been absorbed by the filter paper and sucked into the tube, and (2), it not infrequently happens that the filtered liquid begins to flow out when suction
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmicroscopy, bookyear1
