...p. 21. Again : — ' The proper, constant, and inexhaustible sources of oxygen gas are tbe-tropics and warm climates, where a sky seldom clouded permits...immeasurably luxuriant vegetation. The temperate and frigid zones, where artificial warmth must replace the deficient heat of the sun, produce, on the contrary,...

...colour from the top downwards ; and the true formation of woody tissue commences at the same time. The proper, constant, and inexhaustible sources of...climates, where a sky, seldom clouded, permits the glowing of which we will suppose to be 105 square metres, and which receives six coats of lime in four days,...

...oxygen gas are the tropics and warm cl ¡mates, where a sky seldom clouded permits the glowing rays ul the sun to shine upon an immeasurably luxuriant vegetation....artificial warmth must replace deficient heat of the aun, produce, on the contrary, carbonic acid in superabundance, which is expended in the nutrition...

...This would certainly form a cogent argument did we not look on the whole field of creation at once. The proper, constant, and inexhaustible sources of...climates ; where a sky, seldom clouded, permits the sun to shine upon an immeasurably luxuriant vegetation. The temperate and cold zones must on the contrary...

...of carbon contained in sea-water, is proportionally still greater." 22. We have not deemed it at ail necessary to prove that plants have the power of decomposing...climates, where a sky, seldom clouded, permits the glowing rajs of the sun to shine upon an immeasurably luxuriant vegetation. The temperate and cold zones, where...

...zones ceases to decompose the carbonic acid generated by the processes of respiration and combustion, the proper, constant, and inexhaustible sources of...to shine upon an immeasurably luxuriant vegetation. In our winter, when artificial warmth must replace deficient heat of the sun, carbonic acid is produced...

...purpose, for which it is required. The quantity of carbon in sea water it proportionally still greater. The proper, constant, and inexhaustible sources of...and cold zones, where artificial warmth must replace the deficient heat of the sun, produce, on the contrary, carbonic acid in superabundance, which is...

...that is, of vital air. " The proper, constant, and inexhaustible sources of oxygen," says Liebig, " are the tropics and warm climates; where a sky, seldom...to shine upon an immeasurably luxuriant vegetation. In our winter, when artificial warmth must replace deficient heat of the sun, carbonic acid is produced...

...supply the pure air to other regions where the leaves fade and the light is deficient. Liebig says : " The proper, constant, and inexhaustible sources of...and cold zones, where artificial warmth must replace the deficient heat of the sun, produce, on the contrary, carbonic acid in superabundance, which is...

...stunted has less power of decomposing the poisonous gas and eliminating oxygen than in the torrid zones, "where a sky, seldom clouded, permits the glowing...shine upon an immeasurably luxuriant vegetation," and where oxygen is given out abundantly. Between these regions the winds effect an interchange, conveying...