MEASUREMENT OF DENSITY 49 



used than the density bottle previously described. A tube of the 

 form shown in Fig. 38 can be obtained, or can be made from a piece 

 of quill tubing. The capillary tubes may be dispensed with, if the tube 

 is drawn out at one side, and a file mark put on the other tube as shown 

 at m, Fig. 38. Such an apparatus is filled as described above, but the 

 liquid is allowed to run out till the file mark is reached, as in the case 

 of a graduated pipette. 



J.O.S. 



