More Than Full
If a glass is full of water it will not hold anything else; that is obvious. But——
Fill a glass with water. Stand it on a level surface. Wipe the edge of the glass very carefully, because for the purpose of this experiment it must be quite dry. Then, with a steady hand bring the edge of a sixpence to the surface of the water and let the coin go. If you are careful you can put a dozen sixpences into the glass without causing the water to run over the brim.
The Obedient Corks
For this little experiment you want a nice large rose bowl, full of water, and seven corks. The trick is to put the corks into the water and to cause them to float in a perpendicular position.
This is how you do it. Grasp all the corks in one hand, and hold them under the water until they are thoroughly soaked. Then hold them in the position you wish them to assume and let them go; they will remain close together and in an upright position.
A Peculiar Egg
The peculiarity of the egg used in this experiment is that it neither floats on the top of a large glass of water nor sinks to the bottom, but merely remains an inch or two under water all the time.
Make a saturated solution of salt and half fill a big tumbler with it. Then, with a spoon fill up the tumbler with ordinary water, putting it in very steadily so that it does not mingle with the brine at the bottom of the glass. Now if you drop an egg gently into the liquid—which looks like ordinary water—the egg will sink down through the water, but will come to a standstill on to the top of the brine.