First. Displacing the water from the cotton, for this purpose, with strong alcohol, as set forth. I do not claim the use of alcohol as a desiccating agent, but limit my claim to its special use and purpose, as herein stated.
Second. The employment of bromide of potassium in combination with collodion.
James A. Cutting.
| T. Campbell, Samuel Grubb. | } | Witnesses. |
Dated July 11th, 1854.
PATENT FOR THE USE OF JAPANNED SURFACES PREVIOUSLY PREPARED UPON IRON OR OTHER METALLIC OR MINERAL SHEETS OR PLATES IN THE COLLODION PROCESS.
To all whom it may concern:
Be it known that I, Hamilton L. Smith, of Gambier, in the County of Knox, and State of Ohio, have invented certain new and useful improvements in Photographic Pictures, and I do hereby declare the following to be a full, clear, and exact description of the same, and of the manner of making and using my invention or discovery.
The nature of my invention or discovery relates to the taking of positive pictures by the photographic process, upon a black japanned surface prepared upon iron or any other metallic plates or sheets, and consists in the use of collodion, and a solution of a salt of silver, and an ordinary camera.