cap 101 the adjustment fitting 10 k is a very important part of the present invention by means of the adjustment fitting 10 k which is slidably fitted into the end cap 10 j the line 10 c can be raised or lowered to position the tip 10 e just above the meniscus 23 an adjustment nut 30 riding on threads 30 a rides in a groove formed by a raised ring on the fitting 10 k and tube union 10 o only line 10 c is so adjustable line 10 a is fixed in place fig3 a and 3 b actually depict two different dispositions of the tapered container 10 i depending on whether the raffinate 24 is heavier or lighter than the extract 22 which is typically of smaller volume referring now to fig3 a 3 b and 4 the tapered container 10 i has first and second ends 10 m and 10 n the container 10 i is constructed and arranged to hold the extract 22 and raffinate 24 the container 10 i is preferably made of glass and tapers from wide to narrow in a direction away from the first end 10 m toward the second end 10 n the tapered container 10 i is so arranged that the narrower second end 10 n is pointed in a direction facilitating removal of the phase having the smaller volume u2014 typically the extract if the extract 22 is less dense than the raffinate 24 fig3 a the container 10 i is disposed vertically with the first end 10 m of the container 10 i below the second end 10 n of the container 10 i if the extract 22 is more dense than the raffinate 24 fig3 b the.