[austiwawa] was playing around with one of those simple linear motors people build as friendly little science experiments. There’s an AA battery in the middle of a set of magnets. When you put it ...

How do you judge the power of a simple science experiment? Step inside a 4th grade classroom—and behold the near-total silence. One recent day, elementary teacher Jamie Curbow achieved just that, as ...

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(1) A Laboratory Manual of Experiments in Physics. By Prof. Leonard Rose Ingersoll. Pp. ix + 220. (New York: McGraw-Hill Book Co., Inc.; London: McGraw-Hill ...

IN order to assign any work to its proper place it is necessary that we should try to ascertain what is the author's aim in writing it, and also to see if that aim be to any fair extent attained; ...