Part 28

Water, changes of volume of, 118-122; maximum density of, 120; effects of expansion of, 121; not a solitary exception to general law, 124; molecular expansion of, 125-127; temperature necessary to freeze the sea, 132; special solidifying power of, 173; freezing-point of, 168. Waves, of light, 8-11, 127; length of, 12; of heat, 12. Whiteness of a clean glacier, 43, 176; of Märgelin See, 138, 176; of snow, 176; of ice formed in freezing mixtures, 177.

THE END.

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Transcriber Note

On page 61 (153), Principal was changed to Professor. Minor typos were corrected. Some images were moved to avoid splitting paragraphs.