 | 1870 - 588 pàgines
...full, if it be inverted, the gas passes upwards like a black smoke among the illuminated particles. The air of our London rooms is loaded with this organic dust, nor is the country air free from its pollution. However ordinary daylight may permit it to disguise itself, a sufficiently powerful... | |
 | 1870 - 586 pàgines
...full, if it be inverted, the gas passes upwards like a black smoke among the illuminated particles. The air of our London rooms is loaded with this organic dust, nor is the country air free from its pollution. However ordinary daylight may permit it to disguise itself, a sufficiently powerful... | |
 | Sir Norman Lockyer - 1870 - 684 pàgines
...full, if it be inverted, the gas passes upwards like a black smoke among the illuminated particles. The air of our London rooms is loaded with this organic dust, nor is the country air free from its pollution. However ordinary daylight may permit it to disguise itself, a sufficiently powerful... | |
 | 1870 - 936 pàgines
...of the world, that the dust of our nir was, in great part, inorganic and non-combustible. Tbe air of London rooms is loaded with this organic dust, nor is the country air free from its pollution. However ordinary .day light may permit it to disguise itself, a sufficiently powerful... | |
 | 1870 - 746 pàgines
...in future, for destroying or intercepting contagia. "The air of our London rooms," says Dr. Tyndall, "is loaded with this organic dust; nor is the country air free from its pollution. However ordinary daylight may permit it to disguise itself, a sufficiently powerful... | |
 | 1870 - 746 pàgines
...in future, for destroying or intercepting contagia. "The air of our London rooms," says Dr. Tyndall, "is loaded with this organic dust ; nor is the country air free from its pollution. However ordinary daylight may permit it to disguise itself, a sufficiently powerful... | |
 | John Tyndall - 1871 - 436 pàgines
...full, if it be inverted, the gas passes upward like a black smoke among the illuminated particles. The air of our London rooms is loaded with this organic dust, nor is the country air free from its presence. However ordinary daylight may permit it to disguise itself, a sufficiently powerful beam... | |
 | 1871 - 604 pàgines
...full, if it be inverted, the gas passes upwards like a black smoke among the illuminated particles. The air of our London rooms is loaded with this organic dust, nor is the country air free from its pollution. However ordinary daylight may permit it to disguise itself, a sufficiently powerful... | |
 | 1871 - 308 pàgines
...full, if it be inverted, the gas passes upwards like a black smoke among the illuminated particles. The air of our London rooms is loaded with this organic dust, nor is the country air free from its pollution. However ordinary daylight may permit it to disguise itself, a sufficiently powerful... | |
 | Royal institution of Great Britain - 1872 - 628 pàgines
...withdrawal of the light. Hence the cross section of the sheath surrounds the dark band as a darker ring. The air of our London rooms is loaded with this organic dust, nor is the country air free from its pollution. However ordinary daylight may permit it to disguise itself, a sufficiently powerful... | |
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The air of our London rooms is loaded with this organic dust, nor is the country air free from its pollution. However ordinary daylight may permit it to disguise itself, a sufficiently powerful beam causes the air in which the dust is suspended to appear... 
