Equation 9 · Part 1 · The Machine Before Electronics
Symbol h
What this part means
h is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Its job in the formula
h is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Full expression→Symbol h→Article meaning
The passage around this formula
Thomson’s machine implements exactly that division. Each of the ten shafts in the 1872 instrument carries an overhead crank with a pulley pivoted on a parallel axis that is adjustable for the range applying to that place — the amplitude — and each crank can be positioned and clamped to correspond to the required tidal epoch — the phase . The shafts are geared so that their periods are proportional to the periods of the tidal constituents — the frequencies [ 3 ] . The summing cord performs the . The pen writes h(t) against a moving paper roll while a single crank drives everything at once.
Learn the underlying idea
A function assigns an output to each allowed input. The expression f(x) means “apply f to x”.
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Sources cited in the surrounding passage
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