The Quarterly Journal of Science, Literature and Art, Volume 23Henry Colburn, 1827 |
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Pagina 55
... metal , it deteriorates and discolours it . In taking our leave of Mr. William Campbell Ottley , we sincerely advise , that before he again comes forth in the shape of an author , he should seriously consider whether or not he has ...
... metal , it deteriorates and discolours it . In taking our leave of Mr. William Campbell Ottley , we sincerely advise , that before he again comes forth in the shape of an author , he should seriously consider whether or not he has ...
Pagina 65
... metal is some- times objectionable ; but my remarks are at present intended to apply to fresh - water baths only . The hot water should enter the bath by a pipe at least an inch and a half in diameter , and the cold water by one of the ...
... metal is some- times objectionable ; but my remarks are at present intended to apply to fresh - water baths only . The hot water should enter the bath by a pipe at least an inch and a half in diameter , and the cold water by one of the ...
Pagina 116
... metal for the purpose , by the manner in which it works upon the anvil . It should be rather fine - grained than otherwise , and above all things perfectly even and uniform in its texture , and free from spots and patches finer or ...
... metal for the purpose , by the manner in which it works upon the anvil . It should be rather fine - grained than otherwise , and above all things perfectly even and uniform in its texture , and free from spots and patches finer or ...
Pagina 117
... metal , the die is ready for the important operation of hardening , which , from various causes , a few of which I ... metal is usually employed for this purpose . The die is warmed , and placed in a convenient box , in which the melted ...
... metal , the die is ready for the important operation of hardening , which , from various causes , a few of which I ... metal is usually employed for this purpose . The die is warmed , and placed in a convenient box , in which the melted ...
Pagina 120
... metal in which they are struck , be it gold , silver , or copper , acquires considerable hardness at each stroke of the press , they are re- peatedly annealed during the progress of bringing them up . In a beautiful medal , which , as ...
... metal in which they are struck , be it gold , silver , or copper , acquires considerable hardness at each stroke of the press , they are re- peatedly annealed during the progress of bringing them up . In a beautiful medal , which , as ...
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