. Laboratory exercises in elementary physics. ed cylinder; body whose volumeis to be measured; water. Method B: Piece of fine wire; cylinder; rubber band; paper formarkers; body; water. Method C: Burette or equivalent; ungraduated jar or equivalent;rubber band; paper for markers; body; water. Object.—To determine the volume of an irregular bodyby displacement. Manipulation.—Method A. Fill the graduated cylin-der part full of water, read the volume (as a in Fig. 57),observing all the precautions given in the preliminarynotes on determination of volume, and record the the body whose
. Laboratory exercises in elementary physics. ed cylinder; body whose volumeis to be measured; water. Method B: Piece of fine wire; cylinder; rubber band; paper formarkers; body; water. Method C: Burette or equivalent; ungraduated jar or equivalent;rubber band; paper for markers; body; water. Object.—To determine the volume of an irregular bodyby displacement. Manipulation.—Method A. Fill the graduated cylin-der part full of water, read the volume (as a in Fig. 57),observing all the precautions given in the preliminarynotes on determination of volume, and record the the body whose volume is to be determined (as e) intothe cylinder, and again read the volume (as C). The dif-ference in the readings on the scale (a to C) is the volumeof the body. Method B. Attach a fine thread or wire to the bodywhose volume is to be determined, and drop the body intothe glass cylinder. Partially fill the cylinder with water. * As in using the shellac in the exercise on the lines of magneticforce. PRACTICE IN DETERMINING VOLUMES. 75. Mark the level of the water by means of a piece of paperabout 4 cm. wide and long enoughto be wrapped several times aroundthe cylinder. Fasten this markerin position by a rubber band. Besure that the upper edge of thepaper is at the same level allaround the cylinder, and that, whenlooked at horizontally, the line ofthe paper just touches the lowestpoint of the meniscus. By meansof the thread remove the object,allowing as much of the water aspossible to drain back into thecylinder. Run in water with aburette until the level in the cylin-der is the same as before. Thevolume of water run in, as measuredon the burette, is the volume of the body. Method C. From a burette, run into a dry, emptycylinder any known volume of water,—say 50 cu. cm.—and mark its meniscus by a strip of paper as in the cylinder, wipe it dry and put in the objectwhose volume is to be determined. Run in water fromthe burette until the level is the same as it w
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