Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Books Books
" A piece of the ordinary sensitized paper, such as is used for photographic printing, when exposed to the action of the light for twenty seconds, at a distance of 2 feet from the reflector, was darkened to the same degree as was a piece of the. "
Journal of the Franklin Institute - Page 399
by Franklin Institute (Philadelphia, Pa.) - 1866
Full view - About this book

Proceedings of the Royal Society of London, Volume 15

Royal Society (Great Britain) - 1867 - 662 pages
...from the reflector, was darkened to the same degree as was a piece of the. same sheet of paper when exposed for a period of one minute to the direct rays...noon, on a very clear day in the month of March. The extraordinary calorific and illuminating powers of the 10-inch machine are all the more remarkable...
Full view - About this book

Chemical News and Journal of Industrial Science, Volumes 13-14

1866 - 642 pages
...from the reflector, was darkened to the same degree as was a piece of the same sheet of paper when exposed for a period of one minute to the direct rays...noon on a very clear day in the month of March. The extraordinary calorific and illuminating powers of the io-inch machine are all the more remarkable...
Full view - About this book

The Quarterly Journal of Science, Volume 3

1866 - 658 pages
...from the reflector, was darkened to the same degree, as a piece of the same sheet of paper was when exposed for a period of one minute to the direct rays...mid-day sun was shining brightly in at the window. He took the opportunity of roughly comparing the intensity of the sun, with that of the electric light...
Full view - About this book

Quarterly Journal of Science: 1866, Volume 3

1866 - 736 pages
...from the reflector, was darkened to the same degree, as a piece of the same sheet of paper was when exposed for a period of one minute to the direct rays...mid-day sun was shining brightly in at the window. He took the opportunity of roughly comparing the intensity of the sun, with that of the electric light...
Full view - About this book

The Chemical News and Journal of Physical Science, Volumes 13-24

1866 - 636 pages
...from the reflector, was darkened to the same degree as was a piece of the same sheet of paper when exposed for a period of one minute to the direct rays...noon on a very clear day in the month of March. The extraordinary calorific and illuminating powers of the io-inch machine are all the more remarkable...
Full view - About this book

Chemical News and Journal of Industrial Science, Volumes 13-14

1866 - 638 pages
...from the reflector, was darkened to the same degree as was a piece of the same sheet of paper when exposed for a period of one minute to the direct rays of the sun at noon on a very clear day_ in the month of March. The extraordinary calorific and illuminating powers of the io-inch machine...
Full view - About this book

Proceedings of the Royal Society of London

Royal Society (Great Britain) - 1867 - 654 pages
...from the reflector, was darkened to the same degree as was a piece of the same sheet of paper when exposed for a period of one minute to the direct rays...noon, on a very clear day in the month of March. The extraordinary calorific and illuminating powers of the 10-inch machine are all the more remarkable...
Full view - About this book

A Handbook of Chemical Technology

Johannes Rudolf Wagner - 1872 - 808 pages
...from the reflector, was darkened to the same degree as a piece of the same sheet of paper was when exposed for a period of one minute to the direct rays...at noon on a very clear day in the month of March. Paper could be easily set on fire with a burning-glass introduced in the path of the rays from the...
Full view - About this book

A Handbook of Chemical Technology

Johannes Rudolf Wagner - 1872 - 790 pages
...from the reflector, was darkened to the ваше degree as a piee* of the same sheet of paper was when exposed for a period of one minute to the direct rays of the sun at noon on a very clear day in the mouth of March. Poper could be easily set on lire with a burning-glass introduced in the path of the...
Full view - About this book

A Handbook of Chemical Technology

Johannes Rudolf Wagner - 1872 - 786 pages
...from the reflector, was darkened to the same degree as a piece of the ваше sheet of paper was when exposed for a period of one minute to the direct rays of the sun at noon ou a ver}' clear day in the month of March. Paper could be easily set on fire with a burning-glass...
Full view - About this book




  1. My library
  2. Help
  3. Advanced Book Search
  4. Download EPUB
  5. Download PDF