The Universal Preceptor: Being a General Grammar of Arts, Sciences, and Useful Knowledge ...A. Phelps, 1826 - 312 страница |
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Страница 8
... metals , they do not possess the simple method of communicating a spark to tinder , by the violent collision of flint and steel . 18. The clothing of savage nations has reference solely to the inclemency of the weather : and consists ...
... metals , they do not possess the simple method of communicating a spark to tinder , by the violent collision of flint and steel . 18. The clothing of savage nations has reference solely to the inclemency of the weather : and consists ...
Страница 17
... metals . Without iron , he could have no very use- ful , sharp instrument ; -such as the spade , hoe , plough ... metals in ordinary use , we consid- er them common productions ; but no art is so curious , as that of extracting metals ...
... metals . Without iron , he could have no very use- ful , sharp instrument ; -such as the spade , hoe , plough ... metals in ordinary use , we consid- er them common productions ; but no art is so curious , as that of extracting metals ...
Страница 18
... Metals are very seldom found in a pure state ; but perhaps the first discoverer , having found some metal in a detached or pure state , was led to make ex- periments on those lumps of shapeless and coarse , but heavy earth ; which ...
... Metals are very seldom found in a pure state ; but perhaps the first discoverer , having found some metal in a detached or pure state , was led to make ex- periments on those lumps of shapeless and coarse , but heavy earth ; which ...
Страница 19
... metals , are scientifically divided into four classes . 1. Earthy Minerals - being all such , as are void of taste and smell , light and brittle ; as millstone , flint or silex , clay , sand , crystals , spar , gypsum , alabaster ...
... metals , are scientifically divided into four classes . 1. Earthy Minerals - being all such , as are void of taste and smell , light and brittle ; as millstone , flint or silex , clay , sand , crystals , spar , gypsum , alabaster ...
Страница 20
... metals , produced by the continued action of the air and water on them ; and capable , by suitable means , of being reconverted into metals ! 82. Platina is the heaviest of all metals , being 23 times heavier than waters but it is a ...
... metals , produced by the continued action of the air and water on them ; and capable , by suitable means , of being reconverted into metals ! 82. Platina is the heaviest of all metals , being 23 times heavier than waters but it is a ...
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