erve where the ing so much water as to ren- gelatine becomes insoluble, der it of almost the quick- seeing that we can eliminate sand variety. Soft red clay the acid without modifying followed, until the shale, bet- the properties of the insoluble ter known as Jersey red rock, gelatine. We may… … the bichromatized gelatine had been sunk, they occupied by successive treatments of a space 45 feet square. They boiling water can be prevent- were then cut off 2 feet below ed either by washing the the permanent water level, treated gelatine in the proper way with ammonia red, segmental brick, the…
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