Chemical News and Journal of Industrial Science, Tomy 5-6Chemical news office., 1862 |
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Strona 36
glass , a bar of glass such as I have here in my hand . It is simply a rod of glass with two plane polished surfaces . I will interpose this bar across the slit , and when I allow the light from the slit to pass through the bar at right ...
glass , a bar of glass such as I have here in my hand . It is simply a rod of glass with two plane polished surfaces . I will interpose this bar across the slit , and when I allow the light from the slit to pass through the bar at right ...
Strona 87
An Examination of Pompeian Glass has returned the glass on itself , and thus led. CHEMICAL NEWS , Aug 16 , 1862 . this when the object is to obtain a silvered glass , but in some cases I deposit a considerable thickness of copper on to ...
An Examination of Pompeian Glass has returned the glass on itself , and thus led. CHEMICAL NEWS , Aug 16 , 1862 . this when the object is to obtain a silvered glass , but in some cases I deposit a considerable thickness of copper on to ...
Strona 88
... glass . his " History of the World , " says that obsidian was used as mirrors , and it is evident that it must have been pre- viously polished . The Pompeian window - glass is of a bluish - green tint , like the common glass fifty years ...
... glass . his " History of the World , " says that obsidian was used as mirrors , and it is evident that it must have been pre- viously polished . The Pompeian window - glass is of a bluish - green tint , like the common glass fifty years ...
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