The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 388
of a sulphuret, thepatentee adds copper pyrites thereto, in the proportion of 4 cwt. ofthe latter lo IG cwt. of ore, and then proceeds in the manner abovedescribed, viz., bringing the material into a state of regulus, and fus-ing it with soda-ash, lime, coal, iron, and galena. In conclusion, the… … Mr. Pitt has obtained a patent for an ingenious improvement in themode of fixing the furniture on locks and shutter knobs, as shown inthe annexed engraving; by which, it will be seen that the spindle isnot fastened to the knob,but is merely let into the socket. Thismethod obviates the necessity of…
Architecture · Civil engineering · Science
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