 | 1834 - 494 pages
...black part of the dress is quite hot to the touch, the white will be quite cool. " Again," he says, *' try to fire paper with a burning-glass. If it be white...you will not easily burn it, but if you bring the focus to a black spot, or upon letters written or printed, the paper will immediately be on fire under... | |
 | 1834 - 502 pages
...black part of the dress is quite hot to the touch, the white will be quite cool. " Again," he says, '' try to fire paper with a burning-glass. If it be white...you will not easily burn it, but if you bring the focus to a black spot, or upon letters written or printed, the paper will immediately be on fire under... | |
 | Benjamin Franklin, Jared Sparks - 1838 - 632 pages
...quarter of an hour in your garden when the sun shines, with a part of your dress white, and a part black ; then apply your hand to them alternately,...quite hot to the touch, the white still cool. Another. Try to fire the paper with a burning glass. If it is white, you will not easily burn it ; but if you... | |
 | 1839 - 230 pages
...quarter of an hour in your garden, when the sun shines, with a part of your dress white, and a part black ; then apply your hand to them alternately,...warmth. The black will be quite hot to the touch, and the white still cool. Try to fire paper with a burning-glass ; if it be white, you will not easily... | |
 | Benjamin Franklin - 1840 - 640 pages
...quarter of an hour in your garden when the sun shines, with a part of your dress white, and a part black ; then apply your hand to them alternately,...quite hot to the touch, the white still cool. Another. Try to fire the paper with a burning glass. If it is white, you will not easily burn it ; but if you... | |
 | T. C. Thornton - 1846 - 268 pages
...a quarter of an hour in your garden, when the sun shines, with a part of your dress white and a put black ; then apply your hand to them alternately,...difference in their warmth. The black will be quite hot to their touch, and the white still cool. Try to fire paper with a burning glass ; if it be white, you... | |
 | Benjamin Franklin - 1853 - 522 pages
...of your dress white, and a part blnpk; then apply your hand to them alternately, and you will find u very great difference in their warmth. The black will...quite hot to the touch, the white still cool. Another. Try to fire the paper with a burning-glass. If it white, you will not easily burn it; but, if you bring... | |
 | Benjamin Franklin - 1855 - 522 pages
...quarter of an hour in your garden when the sun shines, with a part of your dress white, and a part black ; then apply your hand to them alternately,...quite hot to the touch, the white still cool. Another. Try to fire the paper with a burning-glass. If it is white, you will not easily burn it; but, if you... | |
 | John Platts - 1876 - 986 pages
...quarter of an hour in your garden when the sun shines, with a part of your dress white, and a part black ; then apply your hand to them alternately,...hot to the touch, the white still cool. " Another. Try to fire paper with a burning-glass. If it be white, you will not easily burn it; but if you bring... | |
 | Benjamin Franklin - 1906 - 502 pages
...quarter of an Hour in your Garden when the Sun shines, with a part of your Dress white, and a Part black; then apply your Hand to them alternately, and...quite hot to the Touch, the White still cool. Another. Try to fire Paper with a burning Glass. If it is White, you will not easily burn it; but if you bring... | |
| |
Walk but a quarter of an hour in your garden when the sun shines, with a part of your dress white, and a part black; then apply your hand to them alternately, and you will find a very great difference in their warmth. The black will be quite hot to the... 
