The principles of chemistry : illustrated by simple experiments / by Julius Adolph Stöckhardt ; translated by C.H. Peirce.

  • Stöckhardt, Julius Adolph, 1809-1886.
Date:
1852
Catalogue details

Licence: Public Domain Mark

Credit: The principles of chemistry : illustrated by simple experiments / by Julius Adolph Stöckhardt ; translated by C.H. Peirce. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

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    weight and measure. Its unit is derived from the size of our globe. In order to define the different localities on this globe, imaginary circles, as is well known, have been drawn around it. Those which pass round the earth from east to west, the largest of which is the equator, are called parallels of latitude (circles of latitude); those which pass round the earth lengthwise, intersect- ing at the poles, meridians (circles of longitude). The parallels of latitude grad- Fig.2. ually become smaller to- wards the poles; the me- ridians, on the contrary, are all of equal size. The circle, NESWN repre- sents a meridian or circle of longitude. The fourth part of this circle, or, what is the same thing, the fourth part of the cir- cumference of our earth, as N E, is the basis of the French system. This quadrant was divided info ten million parts, one of which was taken as the unit, under the name of meter. A meter is about three feet and a quarter in length. The smaller measures are produced by dividing by ten, and are designated by Latin terms; the larger ones by multiplying by ten, and are designated by Greek terms. Larger Measures. Meter. Decameter = 10 meters. Hectometer = 100 Kilometer = 1,000 Myriameter =10,000 Smaller Measures. Meter. Decimeter = & meter. Centimeter = ji5 Millimeter = JL «