Excerpt from Cane Sugar and Potassium Nitrate as Plasmolysing Agents: Thesis

In this connection, it is worthy of notice, that the guard cells of the test leaf alone show an (irregular) increase from the initial to the final value. If exception be made of the reading on the seventh day, the variations from the value are within the possible error due to the methods. The tendency to increase is made more significant however, by the fact that the check shows an evident decrease in i values.

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