. Foundations of Botany. Botany. 152 FOUNDATIONS OF BOTANY P- p—%. somewhat kidney-shaped and become more or less curved as they are fuller or less full of water (see Sect. 170). 162. Calculation of Number of Stomata per Unit of Area. — In order to get a fairly exact idea of the number of stomata on a unit of leaf-surface, the most convenient plan is to make use of a photo- micrograph. The bromide enlarge- ment No. 12 of the Tower series represents about a twenty-five- hundredth of a square inch of the lower epidermis of the cyclamen leaf, magnified until it is about fifteen inches square. Cou
. Foundations of Botany. Botany. 152 FOUNDATIONS OF BOTANY P- p—%. somewhat kidney-shaped and become more or less curved as they are fuller or less full of water (see Sect. 170). 162. Calculation of Number of Stomata per Unit of Area. — In order to get a fairly exact idea of the number of stomata on a unit of leaf-surface, the most convenient plan is to make use of a photo- micrograph. The bromide enlarge- ment No. 12 of the Tower series represents about a twenty-five- hundredth of a square inch of the lower epidermis of the cyclamen leaf, magnified until it is about fifteen inches square. Count the number of stomata on the entire photograph, then calculate the number of stomata on a square inch of the surface of this leaf. If a cyclamen plant has twelve leaves, each with an average area of six square inches, calculate the number of stomata of the lower epidermis of all the leaves taken Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston, Ginn & company
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