The Universal Preceptor: Being a General Grammar of Arts, Sciences, and Useful Knowledge ...J. M'Gowan for Sir R. Phillips, 1820 - 364 страница |
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Страница 17
... length , get the metal by itself in a pure state . 72. No one , on looking at most of the metal- lic ores , would suspect them to contain metal : they are , apparently , the roughest , coarsest , and least desirable stones , or earths ...
... length , get the metal by itself in a pure state . 72. No one , on looking at most of the metal- lic ores , would suspect them to contain metal : they are , apparently , the roughest , coarsest , and least desirable stones , or earths ...
Страница 20
... length ; and it may be beaten into leaves ; 300,000 of which , are only the thickness of an inch . 84. Silver is 11 times heavier than water ; and next to gold in beauty ; such is its ductility , that it may be drawn out in wire finer ...
... length ; and it may be beaten into leaves ; 300,000 of which , are only the thickness of an inch . 84. Silver is 11 times heavier than water ; and next to gold in beauty ; such is its ductility , that it may be drawn out in wire finer ...
Страница 25
... length , and she requisite crosses and ties may then be made without nequalities in the wall , 79b1031 : The first cement for walls , was either Thuid or clay ; but , in due time , experiment led to the preference of a mixture of lime ...
... length , and she requisite crosses and ties may then be made without nequalities in the wall , 79b1031 : The first cement for walls , was either Thuid or clay ; but , in due time , experiment led to the preference of a mixture of lime ...
Страница 31
... length are called the warp3 and are drawn tight by weights at one end ; at the other , they are divided into two sets , cach set composed of alternate threads ; -on moving a treadle , one set , or every other thread , is thrown up , and ...
... length are called the warp3 and are drawn tight by weights at one end ; at the other , they are divided into two sets , cach set composed of alternate threads ; -on moving a treadle , one set , or every other thread , is thrown up , and ...
Страница 32
... length of the warp has been interwoven with cross threads . Obs . 1. A figure of a simple loom is here given , in which , the parts referred to above may easily be traced . The forms of looms are , however , various , and offen very ...
... length of the warp has been interwoven with cross threads . Obs . 1. A figure of a simple loom is here given , in which , the parts referred to above may easily be traced . The forms of looms are , however , various , and offen very ...
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Страница 95 - twere not absurd To doubt if beams, set out at Nature's birth, Are yet arriv'd at this so foreign world, Though nothing half so rapid as their flight. An eye of awe and wonder let me roll, And roll for ever.
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Страница 91 - Mercury completes his transient year, Glowing, refulgent, with reflected glare ; Bright Venus occupies a wider way, The early harbinger of night and day ; More distant still our globe terraqueous turns, Nor chills intense, nor fiercely heated burns ; Around her rolls the lunar orb of light, Trailing her silver glories through the night ; On the earth's orbit...