107 



of the sack is then tied tightty around a metal fitting which connects 

 with a rubber pipe, and to this pipe a pump is attached. The filter is 

 placed in the tub or vat as shown (fig. 25), and the suction of the pump 

 draws the must through the parts of the asbestos sack and disks, 

 largely freeing the same from floating particles of whatever nature. 

 In some styles of this device a second asbestos sack of coarser weave 

 is drawn over this accordion-like device, and serves to still further 

 assist in straining the liquor. Possibly when the cider is drawn into 

 an open tub at racking off, and this filter is carefully used, the liquor 

 can be filtered bright. 



This style of filter is readily cleansed, it only being necessary to 

 untie the sack, remove the disks, and wash all the pieces carefully. 

 Salt water, used warm, is said to accomplish this much better than 

 fresh water. Filters of this pattern may be connected up in sets on 



FIG. 25. Asbestos sack filter "Filtre maignen." 



a main pipe, or on a central disk of metal, and the capacity may be 

 thus greatly increased. It should be added that all metal parts of 

 connections, pipes, pumps, etc., must be of brass, or other material 

 which will not be attacked by acids. 



German asbestos filter. The Germans use chiefly but two filters, 

 viz, the one made by Fromme (shown at figure 24) and another small 

 affair (fig. 26). The latter is an asbestos filter, but works solely by 

 gravity , as indicated. A self -regulating (J) valve governs the inflow at 

 the top, hence it can be set to work on a cask and left to itself until 

 the receptacle into which the filtrate runs is filled. This device is of 

 small capacity, but does good work. The cylinder is packed with 

 asbestos which can be removed, washed, and re-used. 



Both of these German filters are constructed with the idea of pro- 

 tecting the cider from the air, as it is in nowise exposed by their use 

 except when it is delivered into the cask. This is a point of much 



