Workshop Receipts ...E. & F. N. Spon, 1883 |
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Página 19
... covered by fine charcoal , or borax , which is prevented by renewal from burning , the smallest loss of zinc is ... covering the melted metal with about one per cent . of dried potash ; or , better still , a mixture of potash and soda ...
... covered by fine charcoal , or borax , which is prevented by renewal from burning , the smallest loss of zinc is ... covering the melted metal with about one per cent . of dried potash ; or , better still , a mixture of potash and soda ...
Página 19
... covered . Take a small quantity of the varnish and touch the prominent parts with it ; be- fore it is dry , with a dry pencil lay on a small quantity of gold powder . Varnish over all . Bronzing Copper Utensils.— If the article is not ...
... covered . Take a small quantity of the varnish and touch the prominent parts with it ; be- fore it is dry , with a dry pencil lay on a small quantity of gold powder . Varnish over all . Bronzing Copper Utensils.— If the article is not ...
Página 20
... covered with two or three folds of lasting ; the inside is scoured bright , and the parts soldered together , using resin . Medals only want brushing up with wet crocus , taking care not to touch with hand , and then colouring as above ...
... covered with two or three folds of lasting ; the inside is scoured bright , and the parts soldered together , using resin . Medals only want brushing up with wet crocus , taking care not to touch with hand , and then colouring as above ...
Página 24
... covered with the same mass , somewhat thinner ; and lastly , with copal varnish alone . Chinese Cement . - Finest pale orange shellac , broken small , 4 oz .; rectified spirit ( the strongest 58 o.p. ) 3 oz .; digest together in a ...
... covered with the same mass , somewhat thinner ; and lastly , with copal varnish alone . Chinese Cement . - Finest pale orange shellac , broken small , 4 oz .; rectified spirit ( the strongest 58 o.p. ) 3 oz .; digest together in a ...
Página 41
... covered vessel by the heat of a water bath ; after cooling , add with caution 7 oz . of nitric acid ; when cold , bottle off . 2. White glue , 16 oz .; dry white - lead , 4 oz .; soft water , 2 pints ; alcohol , 4 oz .; stir together ...
... covered vessel by the heat of a water bath ; after cooling , add with caution 7 oz . of nitric acid ; when cold , bottle off . 2. White glue , 16 oz .; dry white - lead , 4 oz .; soft water , 2 pints ; alcohol , 4 oz .; stir together ...
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Termos e frases comuns
allowed alum ammonia antimony applied bath blue boiling borax bottle brass brush burnished calcined carbonate chloride clean cloth coat cold collodion colour cool copper covered cyanide deposit diluted dipped dissolved dried edge filter fire fustic gallons gelatine gilding glass glaze glue gold grains ground gutta-percha heat hydrochloric acid immersed inch iron leather lime linseed oil liquid liquor litharge logwood marble melted mercury metal mixed mixture mould nitrate nitrate of silver nitric acid oxide paint paper pearlash piece pint plate polish potash powder precipitate prepared pure quantity removed sal ammoniac salt seed-lac shellac soap soda soft solder solution spirits of wine stirring stone sufficient sulphate sulphuric acid surface thick thin tint tion turpentine varnish vessel warm wash white-lead wire wood yellow zinc
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