... The matrix is rust of iron (or hydrous peroxide of iron and hematite), and in it are imbedded water-worn pebbles of sandstone and quartz...
David Livingstone 「Missionary Travels and Researches in South Africa」
...Pure clay is a hydrous silicate ofalumina, containing 47 parts per cent...
Richard Glazier 「A Manual of Historic Ornament」
ランダム例文:
collecting gusty Bradford
便利!手書き漢字入力検索
この漢字は何でしょう??