The Universal Preceptor: Being a General Grammar of Arts, Sciences, and Useful Knowledge ...A. Phelps, 1826 - 312 страница |
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Страница 17
... iron or metals . Without iron , he could have no very use- ful , sharp instrument ; -such as the spade , hoe , plough , scythe , or sickle . 67. Hence , till they had discovered the means of obtaining and working iron , men were found ...
... iron or metals . Without iron , he could have no very use- ful , sharp instrument ; -such as the spade , hoe , plough , scythe , or sickle . 67. Hence , till they had discovered the means of obtaining and working iron , men were found ...
Страница 18
... iron , aud other metals . 73. These ores are found in the veins of mountains , or between the strata , or divisions of rocks : general- ly beneath the surface of the ground ; and the pitts or wells , dug in search of the ore , are ...
... iron , aud other metals . 73. These ores are found in the veins of mountains , or between the strata , or divisions of rocks : general- ly beneath the surface of the ground ; and the pitts or wells , dug in search of the ore , are ...
Страница 20
... Iron is 8 times heavier than water ; and is the most useful , and , in England , the most abundant of all the metals . It mixes with the animal , vegetable , and mineral kingdoms . It is melted with more difficulty than gold , silver ...
... Iron is 8 times heavier than water ; and is the most useful , and , in England , the most abundant of all the metals . It mixes with the animal , vegetable , and mineral kingdoms . It is melted with more difficulty than gold , silver ...
Страница 21
... iron . Red and yellow ochres are impure oxides of iron : general- ly where redness is found in the soil , the presence of iron may be suspected . 88 , Tin is an English or Cornish metal , 7 times heavier than water . It is very ...
... iron . Red and yellow ochres are impure oxides of iron : general- ly where redness is found in the soil , the presence of iron may be suspected . 88 , Tin is an English or Cornish metal , 7 times heavier than water . It is very ...
Страница 22
... iron , for a medium of value : so that , if one man had too much corn and wanted wine , he was not obliged to give corn for the wine , but he might sell his corn for so much metal , and buy the wine with the metal , at his convenience ...
... iron , for a medium of value : so that , if one man had too much corn and wanted wine , he was not obliged to give corn for the wine , but he might sell his corn for so much metal , and buy the wine with the metal , at his convenience ...
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