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共 27 段- Equilibrium, rest, exists only, but then always, when nature
- Pythagoras (586 B. C.) knew that the note yielded by a strin
- Galileo (born at Pisa in 1564, died at Arcetri in 1642) was
- Again you smile incredulously. Now this is one of those ques
- Picture to yourself the reverse case. Let us suppose ourselv
- If, now, it be further observed that the sensation of pitch
- Think of a positively charged conductor. Double all the elec
- The fate of all momentous discoveries is similar. On their f
- "There can be no doubt that light consists of the _motion_ o
- Since Galileo, mechanical work, though long under a differen
- "Une démonstration générale du principe des vitesses virtuel
- In mentally separating a body from the changeable environmen
- Of scarcely less importance, it seems, was that movement whi
- Ideas are not all of life. They are only momentary effloresc
- Mayer was so absorbed with the view attained, that the indes
- A small hole in the ground with fire kindled in it constitut
- Newton, when questioned about his methods of work, could giv
- But if the promulgator of a new idea cannot hope for any gre
- Even Huygens when trying to detect the presence of striæ in
- The laws of the resistance of fluids and of air to bodies tr
- In ceasing to regard man as the centre of the world; in disc
- What need is there, for example, of burdening the head of a
- One of his bridges accidentally not having been brought into
- Body, a mental symbol for groups of sensations, 200-203;
- Liquids, forms of, 1-16;
- Wundt, on causality and the axioms of physics, 157-159; 359
- The old dogmatic conception of religion is based upon the sc