THE NORMAL ADVANCE11SCIENCE DEPARTMENTExpansion and Contraction Due to Heat and ColdA Russian proverb has it that a certain manwent through a for...
but the tremendous importance ofwhich only the few ever stop to consider. Irefer to the law: Heat expands, cold contracts.Telegraph wires sa...
concrete walks are upheaved inwarm weather
a stringed instrument tuned ina warm room, rises in pitch when removed to acold one
ice floats
steam rises from thekettle on the fire,—these are some of the common illustrations with which every
one is familiar. To the casual observer they have littlesignificance
to the man of science, they arethe expressions of a great law.There have been two theories of expansionadvanced. One may be called the ...
but italso shone dimmer. The simple explanationwas soon found. The air over the funnel ofthe steamer was between him and Jupiter. Theeffect ...
if laid in winter,a space of a half-inch is left between rails
this allows for expansion in summer. One endof iron bridges is often placed upon rollers forthe same reason. Brooklyn Bridge has a telescopi...