The Universal Preceptor: Being a General Grammar of Arts, Sciences, and Useful Knowledge ... |
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Страница 8
In throwing a stone , they seldom miss the smallest mark ; they transfix fish in the water ; knock down birds on the wing ; and strike every enemy with unerring exactness . Obs . - Every one is acquainted with the success of the ...
In throwing a stone , they seldom miss the smallest mark ; they transfix fish in the water ; knock down birds on the wing ; and strike every enemy with unerring exactness . Obs . - Every one is acquainted with the success of the ...
Страница 18
Pits , from which stone only is extracted , are called stone - quarries . 74. The deepest mines are in Hungary ; and are about three - quarters of a mile below the surface . Many mines are like towns under ground ; and many miners pass ...
Pits , from which stone only is extracted , are called stone - quarries . 74. The deepest mines are in Hungary ; and are about three - quarters of a mile below the surface . Many mines are like towns under ground ; and many miners pass ...
Страница 19
Clay is a mineral ; all stones are minerals ; coal is a mineral ; chalk , and , in short , whatever is not animal or vegetable , is called mineral . 76. The study of minerals has been methodised , and called the science of mineralogy .
Clay is a mineral ; all stones are minerals ; coal is a mineral ; chalk , and , in short , whatever is not animal or vegetable , is called mineral . 76. The study of minerals has been methodised , and called the science of mineralogy .
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Those which first used stone , however rude , and mud or clay to fill up the interstices between the stones , and cement them together , made considerable improvements . After the discovery of iron and metals , when the axe , the hammer ...
Those which first used stone , however rude , and mud or clay to fill up the interstices between the stones , and cement them together , made considerable improvements . After the discovery of iron and metals , when the axe , the hammer ...
Страница 24
great importance ; because , it afforded for building an universal material , as durable as stone , without the expense of carriage , and often with less labour than was required to dig and fashion the stone . The best London bricks are ...
great importance ; because , it afforded for building an universal material , as durable as stone , without the expense of carriage , and often with less labour than was required to dig and fashion the stone . The best London bricks are ...
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