1562
JOURNAL OF CHEMICAL EDUCATION
JULY, 1930
A DIRECT READING VOLUME-METER M. T. CARLISLE AND RHEBA USHER,COKERCOLLEGE, HARTSVILLE. SOUTH CAROLINA
The volume-meter described below may be employed to determine the volume of irregular solids with a high degree of precision. The apparatus consists of a cylinder P (see Figure 1) 4.8 cm. in diameter and 12 cm. long, the bottom of which is drawn out into a tube ED 10 cm. long, containing a bulb of 10-cc. capacity. A milled-in glass stopper with an outlet tuhe MN is inserted in the top of cylinder P. Tube M N is 30 cm. long, 5 mm. in diameter and graduated into fiftieths of one cc. A leveling bulb of mercury attached a t D completes the outfit. The procedure for making determinations is as follows. Flask P is filled with water and the stopper con2.-DEtaining tube MN is inserted. By TAIL OF TUBEMN. means of the leveling bulb the mer- ~~~,","R5d)C,D1v1cury is brought to mark B on outlet tube of cylinder. This causes water to rise in tuhe M N . A reading is made of the height of the water column. The leveling bulb is now lowered until water falls considerably below stopper A , the surplus collecting in bulb C. The stotmer and attached tube is now removed and the FIGURE1.SHOWING CON- sample whose volume is sought is now inserted into the STRUCTION O F cylinder. The stopper is then replaced and the mercury VOLUME-METER brought back to mark B by means of the leveling bulb. A second reading of the water in M N is made. The difference of the two readings of column MN gives the volume of the solid. .A
