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The sun flower as a type of flowering plants by Anne B. Jewett, 1890

The Sun Flower as a Type of Flowering Plants by Anne B. Jewett, 1890, Page 33

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30. in the intercellular spaces is more abundant the larger they are themselves. This circumstance and the much larger number of Stomata on the under side of the leaves are the reasons why evaporation is generally more copious from it than from the upper side of the leaf. The number of Stomata on the upper side of the leaf of the Sunflower in on square millimeter is estimated to be [underlined] 175 [/underlined].
 
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