Semi-hydraulic limes

Grey lime is used to describe some semi-hydraulic limes, which often have a warm grey colour. 

Semi-hydraulic limes (also called feebly-hydraulic) are limes which possess slight hydraulic properties. 

Another classification uses the terms semi-hydraulic and hydraulic , corresponding approximately to feebly and eminently hydraulic respectively. Eminently hydraulic lime is also called Roman lime. 

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See also in sourсe #XX -- [ , ]

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