 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 - Página 241843Visualização integral - Acerca deste livro
 | 1842 - 634 páginas
...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 páginas
...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 páginas
...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 páginas
...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 páginas
...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 páginas
...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 páginas
...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 páginas
...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 páginas
...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 páginas
...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... | |
| |
