 | 1815 - 560 pages
...tender plants from cold, as it appeared to me impossible, that a thin mat, or any such flimsy substance, could prevent them from attaining the temperature...for the practice, which I had before deemed useless. Being desirous, however, of acquiring some precise information on this subject, I drove into the earth... | |
 | William Charles Wells - 1838 - 84 pages
...tender plants from cold, as it appeared to me impossible that a thin mat, or any such flimsy substance, could prevent them from attaining the temperature...for the practice which I had before deemed useless. Being desirous, however, of acquiring some precise information on this subject, I fixed perpendicularly... | |
 | John Frederic Daniell - 1845 - 418 pages
...tender plants from cold ; as it appeared to me impossible that a thin mat or any such flimsy substance could prevent them from attaining the temperature...for the practice which I had before deemed useless." The power of emitting heat in straight lines in every direction, independently of contact, may be regarded... | |
 | john murray - 1845 - 722 pages
...tender plantg from cold, as it appeared to me impossible that a thin mat, or any *uch flimsy substance, could prevent them from attaining the temperature...their heat to the heavens, I perceived immediately * just reason for the practice, which I had before deemed useless." He then ascertained by experiment... | |
 | Charles Tomlinson - 1847 - 132 pages
...tender plants from cold ; as it appeared to me impossible that a thin mat, or any such flimsy substance, could prevent them from attaining the temperature...surface of the earth become, during a still and serene * Daniell's Meteorology. night, colder than the atmosphere, by radiating their heat to the heavens,... | |
 | Josiah Parkes - 1848 - 96 pages
...tender plants from cold, as it appeared to me impossible that a thin mat, or any such flimsy substance, could prevent them from attaining the temperature...the practice, which I had before deemed useless." He then ascertained by experiment that " A difference in temperature of some magnitude was always observed,... | |
 | Robert Hunt - 1851 - 502 pages
...tender plants from cold, as it appeared to me impossible that a thin mat, or any such flimsy substance, could prevent them from attaining the temperature...when I had learned that bodies on the surface of the 2u2 I earth become, during a still and serene night, colder than the atmosphere, by radiating their... | |
 | American Medical Association - 1853 - 980 pages
...tender plants from cold, as it appeared to me impossible that a thin mat or such flimsy substance, could prevent them from attaining the temperature...for the practice which I had before deemed useless." « To obviate the uncomfortable and injurious effects of solar radiation during the day, an umbrella... | |
 | 1854 - 394 pages
...protect plants from cold, as it appeared to me impossible that a thin mat, or any such flimsy substance, could prevent them from attaining the temperature...atmosphere, by radiating their heat to the Heavens, [ perceived immediately a just reason for the practice which I had before deemed useless, lieing desirous,... | |
 | 1854 - 720 pages
...tender plants from cold, as it appeared to me impossible that a thin mat, or any such flimsy substance, could prevent them from attaining the temperature...alone I thought them liable to be injured ; but when I learnt that bodies on the surface of the earth become often colder than the air, by radiating their... | |
| |
I had often, in the pride of half knowledge, smiled at the means frequently employed by gardeners, to protect tender plants from cold, as it appeared to me impossible, that a thin mat, or any such flimsy substance, could prevent them from attaining the... 
