 I placed on a well polished copper plate, a sovereign, a shilling, a large silver medal and a penny. The plate was gently warmed by passing a...  The Chemist - 24 페이지1843전체보기 - 도서 정보
 | 1842 - 634 페이지
...warmed by passing a spirit lamp along its under surface ; when cold, the plate was exposed to the vapour of mercury ; each piece had made its impression, but...supported upon slips of wood, placed on the copper, J th of an inch above the plate. After mercuralization, the space the medal covered wu well marked,... | |
 | Perry Fairfax Nursey - 1842 - 632 페이지
...warmed by passing a spirit lamp along its under surface ; when cold, the plate vas exposed to the vapour of mercury ; each piece had made its impression, but...supported upon slips of wood, placed on the copper, ¿th of an inch above the plate. After mercurialization, the space the medal covered was well marked,... | |
 | 1848 - 600 페이지
...plate gently warmed bypassing a spirit-lamp under its surface, and when cold exposed to the vapour of mercury, each piece had made its impression, —...but those made by the gold and the large medal were the most distinct, the lettering being copied as well as the disc traced out. Impressions of still... | |
 | Leopold Gmelin - 1848 - 568 페이지
...plate gently warmed by passing a spirit-lamp under its surface, and when cold exposed to the vapour of mercury, each piece had made its impression, —...but those made by the gold and the large medal were the most distinct, the lettering being copied as well as the disc traced out. Impressions of still... | |
 | 1843 - 884 페이지
...conductors, make decidedly the strongest impressions when thus treated. 3. I placed upon a well-polished copper plate, a sovereign, a shilling, a large silver...large medal were most distinct ; not only was the disk marked, but the lettering on each was copied. 4. A bronze medal was supported upon slips of wood,... | |
 | Encyclopaedia - 1851 - 276 페이지
...warmed, by passing a spirit-lamp along its under surface: when cold, the plate was exposed to the vapour of mercury: each piece had made its impression, but those made by the gold and the large medal were more distinct; not only was the disc marked, but the lettering on each was copied. 4. A bronze medal... | |
 | Robert Hunt - 1852 - 324 페이지
...warmed, by passing a spirit-lamp along its under surface : when cold, the plate was exposed to the vapour of mercury : each piece had made its impression, but those made by the gold and the large medal were more distinct ; not only was the disc marked, but the lettering on each was copied. rialization, the... | |
 | Robert Hunt - 1852 - 380 페이지
...warmed, by passing a spirit-lamp along its under surface : when cold, the plate was exposed to the vapour of mercury : each piece had made its impression, but those made by the gold and the large medal were more distinct ; not only was the disc marked, but the lettering on each was copied. 4. A bronze medal... | |
 | Robert Hunt - 1853 - 356 페이지
...warmed, by passing a spirit-lamp along its under surface : when cold, the plate was exposed to the vapour of mercury : each piece had made its impression, but those made by the gold and the large medal were more distinct ; not only was the disc marked, but the lettering on each was copied. 4. A bronze medal... | |
 | Robert Hunt - 1854 - 466 페이지
...warmed by passing a spirit lamp along its under surface ; when cold, the plate was exposed to the vapour of mercury ; each piece had made its impression, but...disc marked, but the lettering on each was copied. A bronze medal was supported upon slips of wood, placed on the copper, one-eighth of an inch above... | |
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