...solar heat during the whole day, hut only about one-quarter when the sun is in the zenith. The total amount of heat received by the earth from the sun in a year, if distributed uniformly over its surface, would suffice to melt a layer of ice 100 feet thick covering...

...quoted and the known qualities of heat into a law of much value in the discussion of climate, namely that the amount of heat received by the earth from the sun is proportional to the area described by its radius vector, or, as Sir John Herschell states the case,...

...vertical sun would melt in an hour a sheet of ice about 19 millimeters (threequarters of an inch) thick. From this, it is easily computed that the amount of...sun in a year is sufficient to melt a shell of ice 137 feet thick all over the earth's surface. If we accept the larger value of the solar constant assigned...

...sun would melt in an hour a sheet of ice 24.7 millimeters, or very nearly an inch in thickness. Prom this, it is easily computed that the amount of heat...of the "mechanical equivalent of heat" (Physics, p. 17£) a horse-power (33,000 foot pounds per minute) can easily be shown to be equivalent to about 10.7...

...in • . terms of a kilogram of ice with a specific gravity of 0.92, it follows that, melting ice. taking the solar constant at 30, the heat received...sun in a year is sufficient to melt a shell of ice 225 feet thick on the earth's equator, or 177 feet over the earth's entire surface, if the heat were...

...vertical sun would melt in an hour a sheet of ice 17.3 millimeters, or seven-tenths of an inch thick. From this it is easily computed that the amount of...sun in a year is sufficient to melt a shell of ice 160 feet thick on the earth's equator, or 124 feet over the earth's entire surface, if the heat were...

...received from the sun when overhead would melt in an hour a sheet of ice about ^ of an inch thick. From this it is easily computed that the amount of heat received by the earth from the sun in a year would melt a shell of ice 177 feet thick all over the earth's surface. " Solar engines " have been...

...calibration of the vessel. 186. Origin and Maintenance of Sun's Heat.—There has been no great change in the amount of heat received by the earth from the sun in thousands of years. Langley has shown that the earth receives energy from the sun at the rate of about...

...from the point of view of the climate of the present day may be neglected. Furthermore we are assured that the amount of heat received by the earth from the sun has been diminishing in the course of geological ages. One would therefore expect to find indications...

...from the point of view of the climate of the present day may be neglected. Furthermore we are assured that the amount of heat received by the earth from the sun has been diminishing in the course of geological ages. One would therefore expect to find indications...