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Briefly, however, we may state, that between 0° and 32°, 34 thousandths of an inch must be allowed for depression or contraction, and between 32° and 52° 33 thousandths. The weight of the atmosphere is not only affected by rarefaction, but by currents of air, which give it a sudden density or rarity. Those who have ascended mountains have experienced both these changes.
They started from the measurement of the globe itself, and took as the basis of their whole system the ten-millionth part of a quadrant of a meridian, equal to 39-371/1000 inches English. To express diminution in the decimal ratio, they used the Latin numerals; thus, decimètres, tenths of meters; centimètres, hundredths of meters; milliamètres, thousandths of meters.
Make a narrow slit, a few thousandths of an inch in width, in a sheet of black paper, and support it vertically before a brilliant source of light. Observe this from a distance of 40 or 50 feet with a small telescope magnifying about 30 diameters.
Let the nine hundred and ninety-nine thousandths of a man's life take possession of the one thousandth part of him. Then we will have a civilization. Or at least the nine hundred and ninety-nine thousandths of him will persuade the one thousandth of him to coöperate.
If we determine in thousandths of a second the time needed to recognize the characteristic content of an advertisement, we may discriminate differences which would escape the naïve judgment, and yet which in practical life are of considerable consequence, as the effect of a deficiency is multiplied by the number of readers.
"The acidimeter referred to was afterwards improved, by making the tube longer and more narrow, and dividing it into tenths of per cents, instead of fourths; thus dividing the whole above 0 into thousandths.
The quantity of the solution so used corresponds with the quantity of acids contained in the must the larger division lines opposite the numbers indicating the thousandths part, and the smaller lines or dots the ten thousandths part. "Until the eye has learned by practice to recognize the points of saturation by the tone of color, it can be proven by means of litmus paper.
The long segments of the commoner kind attain a length of from 10 to 30 and even 45 thousandths of a millimetre. On June 28th, fermentation was quite finished; there was no longer any trace of gas, nor any lactate in solution. All the infusoria were lying motionless at the bottom of the flask. The liquid clarified by degrees, and in the course of a few days became quite bright.
Nevertheless, men often speak of thousandths of an inch, or of millionths of an inch, or of distances even shorter. Have such fractions of the magnitudes that we do know and can perceive any real existence?
After many experiments and the production of a number of types of machines, the present recorders and reproducers were evolved, the former consisting of a very small cylindrical gouging tool having a diameter of about forty thousandths of an inch, and the latter a ball or button-shaped stylus with a diameter of about thirty-five thousandths of an inch.
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