107 



of the sack is then tied tiohtlv amund a niotal tittiiii'- which connects 

 with a nil)])er pipe, and to tiiis pipe a pump is attached. The filter is 

 placed in the tul) or vat as shown (tig-. 25), and the suction of the pump 

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

 largel}^ 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 li(iuor. Possibly when the cidci- is di-awn into 

 an open tul) at racking- ofl', and this filter is carefully used, the li(juor 

 can be filtered bright. 



This stvle of filter is readilv cleansed, it onlv beino- necessarv to 

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

 Saltwater, used warm, is said to accomplish this nuich l>etter 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 g-reatly increased. It should be added that all metal part.s of 

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

 which will not be attacked ])y acids. 



German ashestos jilter. — The Germans use chiefly but two Alters, 

 viz, the one made by Fronnne (shown at flgure '2-^) and another small 

 aft'air (flg. 26). The latter is an as])estos Alter, but works solely bv 

 g-ravity , as indicated. A self-regulating (/>) 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 



