First Century of National Existence: The United States as They Were and are ... Mineral Wealth ... Public Lands ... Internal Trade ... Immigration ... Banking ... Insurance ... Literature and Authors ...L. Stebbins, 1874 - 586 pages |
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Page 34
... practice about 1852 , first disturbed this popular idea ; but in its earlier history this pro- cess was not entirely free from guess - work and the coming - to - nature theory by some sudden and unexplicable change ; subsequent discov ...
... practice about 1852 , first disturbed this popular idea ; but in its earlier history this pro- cess was not entirely free from guess - work and the coming - to - nature theory by some sudden and unexplicable change ; subsequent discov ...
Page 35
... practice it is never melted , but when the mass attains a pasty or semi - glutinous condition , it is by one process or another , either hammered , pressed , or squeezed till the impurities are forced out of it . Abso- lutely pure iron ...
... practice it is never melted , but when the mass attains a pasty or semi - glutinous condition , it is by one process or another , either hammered , pressed , or squeezed till the impurities are forced out of it . Abso- lutely pure iron ...
Page 44
... practice , is based upon the prop- erty of carbonate of soda to remove from cast iron the carbon it contains , when the metal is kept for a few hours in a bath of the melted alkali . The decarbonizing effect is in part due to the action ...
... practice , is based upon the prop- erty of carbonate of soda to remove from cast iron the carbon it contains , when the metal is kept for a few hours in a bath of the melted alkali . The decarbonizing effect is in part due to the action ...
Page 65
... buried in large bodies of earth , that it is now generally adopted in other gold regions in which the conditions are favorable for its practice . This represents a common method of reaching beds of rich. 15, Hydraulic Mining.
... buried in large bodies of earth , that it is now generally adopted in other gold regions in which the conditions are favorable for its practice . This represents a common method of reaching beds of rich. 15, Hydraulic Mining.
Page 74
... practice , are particularly expert in it . If a vein is to be tested , the quartz is finely crushed , and the powder is then washed in the same manner . Gold may be thus brought to view when none was visible in the stones , however ...
... practice , are particularly expert in it . If a vein is to be tested , the quartz is finely crushed , and the powder is then washed in the same manner . Gold may be thus brought to view when none was visible in the stones , however ...
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