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Lectures on Popular and Scientific Subjects
LECTURES ON POPULAR AND SCIENTIFIC SUBJECTS. COAL AND COAL-MINES. SCIENCE APPLIED TO ART. A PENNY'S WORTH; OR, "TAKE CARE OF THE PENCE, AND THE POUNDS WILL TAKE CARE OF THEMSELVES" PAST AND PRESENT MEANS OF COMMUNICATION. THE STEAM-ENGINE. ON ATTRACTION. THE OIL FROM LINSEED. HODGE-PODGE: OR, WHAT'S INTILT. There are few subjects of more importance, and few less known or thought about, than our coal-mines. Coal is one of our greatest blessings, and certainly one originating cause of England's greatness and wealth. It has given us a power over other nations, and vast sums of money are yearly brought to our country from abroad in exchange for the coal we send. Nearly 17,000,000 is the representative value of the coal raised every year at the pit's mouth, and 20,000,000 represent its mean value at the various places of consumption. The capital invested in our coal-mining trade, apart from the value of the mines themselves, exceeds 20,000,000 sterling, and the amount of coal annually extracted from the earth is over 70,000,000 of tons. Taking the calculation of a working minerJ. Ellwood, Moss Pit, near Whitehavenwe may state, that if 68,000,000 tons were excavated from a mining gallery 6 feet high and 12 feet wide, that gallery would be not less than 5128 miles, 1090 yards, in length; or, if this amount of coal were erected in a pyramid, its square base would extend over 40 acres, and the height would be 3356 feet. ......Buy Now (To Read More)
Ebook Number: 15468
Author: Caithness, James Sinclair
Release Date: Mar 26, 2005
Format: eBook
Language: English
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