oldering iron of octagon section should be used. It has sides of If iodide of mercury is dissolved in iodide of potassium two sizes, its cross section being a square with trun- and water, a liquid of very high specific gravity can be cated corners. If placed upon a narrow side, it rocks slowly… … is produced, a different series may appear. It is easy MELDE'S EXPEBIMENT WITH THE TBEVELYAN l)y this change to throw a quiescent string into motion, BOCKEB. or to stop a moving one ; but it is difficult to success- fully carry the thread through two phases of vibration. is usually performed, a…
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