...solar light to pass through them, and to reeeive the shadows upon prepared leather. When the solar rayj are passed through a print and thrown upon prepare.d...them by producing different intensities of colour. Professor Davy has found, that the images of small objects, produced by means of the solar microscope,...

...cause the direct solar light to pass through them, and to receive the shadows upon prepared leather. When the solar rays are "passed through a print and...them by producing different intensities of colour. Professor Davy has found, that the images of small objects produced by means of the solar microscope...

...acted upon by light, have as yet been successful. They have been covered with a thin coating of fine varnish ; but this has not destroyed their susceptibility...intensities of colour. " The images formed by means of a comerct ofocura have been found too faint to produce, in any moderate time, an effect upon the nitrate...

...acted upon by light, have as yet been successful. They have been covered with a thin coating of fine varnish ; but this has not destroyed their susceptibility...prepared paper, the unshaded parts are slowly copied j but the lights transmitted by the shaded parts are seldom so definite as to form a distinct resemblance...

...acted upon by light, have ag yet been successful. They have been covered with a thin coating of fine varnish; but this has not destroyed their susceptibility...'When the solar rays are passed through a print, and tlirown upon prepared paper, the unshaded parts are slowly copied ; but the lights transmitted by the...

...parts of the leather or paper, to cause them to become dark when exposed to the rays of the sun. " When the solar rays are passed through a print and...resemblance of them by producing different intensities of color. " With regard to the preparation of the solution, I have found the best proportions those of...

...yet been successful. They have been covered with a thin coating of fine varnish; but this has iiot destroyed their susceptibility of becoming coloured....resemblance of them by producing different intensities af colour. “ The images formed by means of a camera obscura have been found to be too faint to produce,...