 | 1840 - Liczba stron: 812
...color, but in its faculty of welding, by the sulphur existing in the coal or coke used in the furnace ; this is prevented by occasionally throwing about a...disappears, but the glass sometimes becomes green or blue, probably by the action of the sulphureous acid gas from the coke. The reddish tint will however... | |
 | 1840 - Liczba stron: 416
...color, but in its faculty of welding, by the sulphur existing in the coal or coke used in the furnace ; this is prevented by occasionally throwing about a...disappears, but the glass sometimes becomes green or blue, probably by the action of the sulphureous acid gas from the coke. The reddish tint will however... | |
 | 1840 - Liczba stron: 644
...colour, but in its faculty of welding, by the sulphur existing in the coal or coke used in the furnace, this is prevented by occasionally throwing about a...from the glass the reddish tint imparted to it by by manganese ; and in large masses, not only the reddish tint disappears, but the glass sometimes becomes... | |
 | Perry Fairfax Nursey - 1840 - Liczba stron: 640
...colour, but in its faculty of welding, by the sulphur existing in the coal or coke used in the furnace, this is prevented by occasionally throwing about a...the fire ; the explosive vapour thus raised carries oft' the sulphureous gas. The process of annealing has the remarkable property of carrying off from... | |
 | Institution of Civil Engineers (Great Britain) - 1848 - Liczba stron: 536
...off the sulphureous gas. The process of annealing has the remarkable property of carrying Annealoff from the glass the reddish tint imparted to it by manganese ; and '"&• in large masses, not only the reddish tint disappears, but the glass sometimes becomes green... | |
 | Institution of Civil Engineers (Great Britain) - 1848 - Liczba stron: 570
...colour, hut in its faculty of welding, by the sulphur existing in the coal or coke used in the furnace, this is prevented by occasionally throwing about a...annealing has the remarkable property of carrying Annealoff from the glass the reddish tint imparted to it by manganese ; and '"£• in large masses,... | |
 | 1840 - Liczba stron: 632
...annealing has the remarkable property of carrying off from the glass the reddish tint imparted to it by by manganese ; and in large masses, not only the reddish tint disappears, but the gloss sometimes becomes green or blue, probably by the action of the sulphureous acid gas from the... | |
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Glass being sometimes deteriorated in the process of reheating, not only in color, but in its faculty of welding, by the sulphur existing in the coal or coke used in the furnace ; this is prevented by occasionally throwing about a quart of cold water... 