slide, and as the worm revolves much comment. Permanent hardness is due to the pre- the powder is screwed forward to this opening, and falls in sence of sulphates of lime and magnesia, which cannot be a greater or less stream into the cistern below. At the same disposed of in so simple a manner as… … caire, which acts upon the salts in solution, and precipitates ft. high, A plant of this description is in operation at the them. The anti-calcaire is composed of three reagents, pre- Exhibition, softening the water for the aquarium and fish pared in a highly triturated state, the composition…
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