...Several pieces of scoria, or lava, were found onthe road, showing a district here once to have hadactive volcanoes... 
James Richardson 「Narrative of a Mission to Central Africa Performed in the Years 1850-51, Volume 2」
...” He adds, “About fourteen years ago I first sawthe ruins of one of these furnaces, situated below York Lodge, andsurrounded by a large heap of slag or scoria that is produced in making pigiron...
H. G. Nicholls 「The Forest of Dean」
ランダム例文：
conscripting Torquay ritualism
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