Journal of the Society of Arts, 2. kötet |
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1 - 5 találat összesen 83 találatból.
18. oldal
It will only be attempted here to indicate such as seem to be types of whole
classes of appliances of the same general character. The processes for securing
gold may be divided mainly into Washing, Smelting, Amalgamation. By Washing,
is ...
It will only be attempted here to indicate such as seem to be types of whole
classes of appliances of the same general character. The processes for securing
gold may be divided mainly into Washing, Smelting, Amalgamation. By Washing,
is ...
20. oldal
But in addition to this it is constantly covered in practice with the mud and refuse
from the grinding operation, which much increases the difficulty of bringing .
whole of the gold—in its condition of flour of gold— into perfect contact with its
surface ...
But in addition to this it is constantly covered in practice with the mud and refuse
from the grinding operation, which much increases the difficulty of bringing .
whole of the gold—in its condition of flour of gold— into perfect contact with its
surface ...
26. oldal
The whole carbon in the blood would thus be burned away in about three days,
unless new fuel were introduced as food. The amount of food necessary depends
upon the number of respirations, the rapidity of the pulsations, and the relative ...
The whole carbon in the blood would thus be burned away in about three days,
unless new fuel were introduced as food. The amount of food necessary depends
upon the number of respirations, the rapidity of the pulsations, and the relative ...
34. oldal
The whole machine is placed upon wheels, to facilitate its removal for repairs to
... It varies from one inch and a half to three inches per minute, the object being to
keep the whole of the bars covered with fuel, with a small accumulation of fire at ...
The whole machine is placed upon wheels, to facilitate its removal for repairs to
... It varies from one inch and a half to three inches per minute, the object being to
keep the whole of the bars covered with fuel, with a small accumulation of fire at ...
38. oldal
The way in which it was effected was by passing a current of air from the front
over the whole, and adjusting the fuel in front, as it was now done in the furnaces
at the Mint. He had often occasion to cross in the steamer from Holyhead to ...
The way in which it was effected was by passing a current of air from the front
over the whole, and adjusting the fuel in front, as it was now done in the furnaces
at the Mint. He had often occasion to cross in the steamer from Holyhead to ...
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advantage amount apparatus appears application Arts association attention believe better called carried cause classes combinations communication condition consideration considered cost Council Dated desirable discussion effect employed employers engines England established examination Exhibition exist experience fact feeling fish flax furnace George give given gold hand heat Henry important improvements increased Institution interest invention iron James John kind labour lecture less Literary London machine machinery manufacture material matter means Mechanics meeting ments metal mind nature necessary object obtained operation opinion passed patent persons practical prepared present principle printing produced profits quantity question received reference result Scientific Society street success supply taken things Thomas thought tion trade various wages whole