A natural philosophy : embracing the most recent discoveries in the various branches of physics, and exhibiting the application of scientific principles in everyday life .. (1899)
Quackenbos, G. P. (George Payn), 1826-1881 · New York, Cincinnati [etc.], American book company · leaf 177
rometer as a Weather-guide.—The barometer shows that thepressure of the atmosphere at anygiven place is different at differenttimes. This is because the air is con-stantly varying in density, on accountof a greater or less intermixture of for-eign substances. When the air isdensest, the mercury… … WTiat did it prove ? 409. Of what does the simplest kind of barometer consist ? Towhat part of the tube is the scale confined, and why ? Describe the Wheel Barom-eter, and its mode of operation. 410. What does the barometer show with respect tothe pressure of the atmosphere ? What occasions this…
Physics
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