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 the position of the seed and cotton to be continually changing.

The cotton fibres, as they are taken round by the teeth of the card cylinder, are brushed off by the rapid revolution of the cylindrical brush, and carried to the bin.

The machine is about 60 inches wide, and can gin 1,500 lbs. of cotton per day. Its cost is $350 (70l.).

64. Railways.—In the construction of railways, economy and speedy completion are the points which have been specially considered. It is the general opinion that it is better to extend the system of railways as far as possible at once, and be satisfied, in the first instance, with that quality of construction which present circumstances admit of, rather than to postpone the execution of work so immediately beneficial to