Attempts have been made, by adding certain coagulants to the water to be filtered, to increase the power of sand and other granular materials to arrest bacteria when passing through them at much higher velocities than are possible for successful filtration by means of the surface film upon sand. [Please select]
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Estates employing anti-coagulants in the field benefit in this respect. [Please select]
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Anti-coagulants may be employed to preserve fluidity, but only within certain limits. [Please select]
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This premature coagulation is usually checked or diminished by the employment of anti-coagulants (see Chapters VIII.) [Please select]
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--We have seen many proprietary coagulants advertised and pass into the limbo of forgotten things. [Please select]
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--When anti-coagulants are not used in the cups or buckets, it is advisable to use them in the bulk-transport vessels. [Please select]
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--It is not proposed here to enter into a discussion as to the merits of the dozens of known coagulants. [Please select]
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