The Universal Preceptor: Being a General Grammar of Arts, Sciences, and Useful Knowledge ...A. Phelps, 1826 - 312 страница |
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Страница 18
... like towns under ground ; and many miners pass their whole lives in them . The want of fresh air , and the influx of water , prevent mines from sink- ing deeper . 75. All the substances which form the ground and earth 18 METALLURGY .
... like towns under ground ; and many miners pass their whole lives in them . The want of fresh air , and the influx of water , prevent mines from sink- ing deeper . 75. All the substances which form the ground and earth 18 METALLURGY .
Страница 19
Sir Richard Phillips. 75. All the substances which form the ground and earth , are called minerals . Clay is a mineral ; all stones are minerals ; coal is a mineral ; chalk , and , in short , whatever is not animal or vegetable , is ...
Sir Richard Phillips. 75. All the substances which form the ground and earth , are called minerals . Clay is a mineral ; all stones are minerals ; coal is a mineral ; chalk , and , in short , whatever is not animal or vegetable , is ...
Страница 21
... substances are Antimony , Bismuth , Cobalt , Arsenic , Manganese , Palladium , Rhodium , Potassium , & c . to the number of thirty ; al- though the ancients knew of only seven metals . 93. Iron is formed into steel , by being heated ...
... substances are Antimony , Bismuth , Cobalt , Arsenic , Manganese , Palladium , Rhodium , Potassium , & c . to the number of thirty ; al- though the ancients knew of only seven metals . 93. Iron is formed into steel , by being heated ...
Страница 25
... substances of animals and fish , were used for this purpose , in the houses of the great ; but all these gave way to the fine invention of glass . 106. That useful material was discovered by acci- dent some Phoenician carriers of soda ...
... substances of animals and fish , were used for this purpose , in the houses of the great ; but all these gave way to the fine invention of glass . 106. That useful material was discovered by acci- dent some Phoenician carriers of soda ...
Страница 31
... substance , now the most used for every purpose of clothing and furniture , is the product of the cotton - tree , or plant . Obs . In hemp , as in flax , it is the cortical part which is retained for the use of the manufacturer : the ...
... substance , now the most used for every purpose of clothing and furniture , is the product of the cotton - tree , or plant . Obs . In hemp , as in flax , it is the cortical part which is retained for the use of the manufacturer : the ...
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