 They have been covered with a thin coating of fine varnish, but this has not destroyed their susceptibility of becoming coloured ; and even after repeated washings, sufficient of the active part of the saline matter will still adhere to the white parts...  A System of Theoretical and Practical Chemistry - Page 115by Friedrich Christian Accum - 1803 - 373 pagesFull view - About this book
 | Science - 1842 - 496 pages
...thin coating of fine varnish, but this has not destroyed their susceptibility of becoming colored ; and even after repeated washings, sufficient of the...to become dark when exposed to the rays of the sun. " When the solar rays are passed through a print and thrown upon prepared paper, the unshaded parts... | |
 | Robert Kemp Philp - 1864 - 1126 pages
...coloured; and even after repeated washings, sufficient of the active part of the saline matter will adhere to the white parts of the leather or paper...cause them to become dark when exposed to the rays <i the sun. Besides the applications of this method of copying that have just been mentioned, there... | |
 | Encyclopaedia - 1851 - 276 pages
...copy or profile from being acted upon by light, have as yet been successful. They have been covered by a thin coating of fine varnish, but this has not destroyed...the applications of this method of copying that have just been mentioned, there are many others ; and it will be useful for making delineations of all such... | |
 | Robert Hunt - Daguerreotype - 1852 - 324 pages
...copy or profile from being acted upon by light, have as yet been successful. They have been covered by a thin coating of fine varnish, but this has not destroyed...the applications of this method of copying that have just been mentioned, there are many others ; and it will be useful for making delineations of all such... | |
 | Art - 1853 - 444 pages
...lias not destroyed their susceptibility of being coloured ; and even after repeated washings, enough of the active part of the saline matter will still...dark when exposed to the rays of the sun. Besides the application of this method of copying that has just been mentioned, there arc many others ; and it... | |
 | Robert Hunt - Photography - 1853 - 356 pages
...coloured ; and even after repeated washings, sufficient of the active part of the saline matter will adhere to the white parts of the leather or paper...the applications of this method of copying that have just been mentioned, there are many others ; and it will be useful for making delineations of all such... | |
 | Robert Hunt - Calotype - 1852 - 378 pages
...coloured ; and even after repeated washings, sufficient of the active part of the saline matter will adhere to the white parts of the leather or paper...the applications of this method of copying that have just been mentioned, there are many others ; and it will be useful for making delineations of all such... | |
 | Robert Hunt - Photochemistry - 1854 - 466 pages
...it is not sensibly affected. No attempts that have been made to prevent the uncoloured parts of the copy or profile from being acted upon by Light have...the applications of this method of copying that have just been mentioned, there are many others ; and it will be useful for making delineations of all such... | |
 | William Somerville Orr - Science - 1856 - 596 pages
...coloured ; and even after repeated washings, sufficient of the- active part of the saline matter will adhere to the white parts of the leather or paper...the applications of this method of copying that have just been mentioned, there are many others ; and it will be useful for making delineations of all such... | |
 | Marcus Sparling - Photography - 1856 - 216 pages
...coloured ; and even after repeated washings, sufficient of the active part of the saline matter will adhere to the white parts of the leather or paper...the applications of this method of copying that have just been mentioned, there are many others ; and it will be useful for making delineations of all such... | |
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