 | 1840 - 272 Seiten
...cement, it was found that the voltaic copper had completely combined with the plate on which it was deposited. A plate was then coated with cement, and...prepared, and engraved on with a sharp point, had the copper deposited on the lines, and this was printed from successfully. Considerable difficulty... | |
 | 1840 - 274 Seiten
...cement, it was found that the voltaic copper had completely combined with the plate on which it was deposited. A plate was then coated with cement, and...prepared, and engraved on with a sharp point, had the copper deposited on the lines, and this was printed from successfully. Considerable difficulty... | |
 | Perry Fairfax Nursey - 1840 - 640 Seiten
...cement, it was found that the voltaic copper had completely combined with the plate on which it waa deposited. " A plate was then coated with cement,...prepared, and engraved on with a sharp point, had the copper deposited on the lines ; and this was printed from successfully. " This was an attempt to... | |
 | 1840 - 702 Seiten
...found the lines were cleared out so as to be wedgeshaped, or somewhat in the form of a V > leaving a hair line of the copper exposed at the bottom, and...galled and rendered rugged by the action of the graver. This, of course, was an important objection ; which I have since been able to remedy, in some respects,... | |
 | 1840 - 516 Seiten
...engraver ; but when it was returned, I found the lines were cleared out so as to be wedgeshaped, leaving a hair line of the copper exposed at the bottom, and...galled, and rendered rugged by the action of the graver. This, of course, was an important objection, which I have since been able to remedy, in some respects,... | |
 | Perry Fairfax Nursey - 1840 - 706 Seiten
...I found the lines were cleared out so as to he wedgeshaped, or somewhat in the form of a Vi leaving a hair line of the copper exposed at the bottom, and a broad spare near the surface ; and where Ihe turn of the letters took place, the top edges of the lines were... | |
 | William Savage - 1841 - 836 Seiten
...cement, it was found that the voltaic copper had completely combined with the plate on which it was deposited. A plate was then coated with cement, and...prepared, and engraved on with a sharp point, had the copper deposited on the lines ; and this was printed from successfully. This was an attempt to... | |
 | James Napier - 1860 - 184 Seiten
...I found the lines were cleared out so as to be wedge-shaped, or somewhat in the form of ay, leaving a hair line of the copper exposed at the bottom, and...galled and rendered rugged by the action of the graver. This, of course, was an important objection, which I have since been able to remedy in some degree... | |
 | James Napier - 1860 - 188 Seiten
...I found the lines were cleared out so as to be wedge-shaped, or somewhat in the form of av, leaving a hair line of the copper exposed at the bottom, and...turn of the letters took place, the top edges of the linos were g«Jlcd and rendered rugged by the action of the graver. This, of course, was an important... | |
 | Oliver Byrne - 1864 - 682 Seiten
...found the lines were cleared out so as to be wedge-shaped, or somewhat in the form of a V, leaving a hair line of the copper exposed at the bottom, and...galled and rendered rugged by the action of the graver. This, of course, was an important objection, which I have since been able to remedy in some degree... | |
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V, leaving a hair line of the copper exposed at the bottom, and a broad space near the surface ; and where the turn of the letters took place, the top edges of the lines were galled and rendered rugged by the action of the graver. This, of course, was... 
