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the ridge and down the other half, the machine being guid-ed both times by means of one of its wheels going in the in-terfurrow. This machine sows 6, 7, or 8 rows at once, as itis previously adjusted to one or other of the intervals alreadymentioned. The most usual interval is 101- inches betweenthe rows, in whicli case the machine sows seven rows at once,or fourteen rows on a ridge of twelve feet and a half. Ondry turnip soil the drilling is often carried on upon land thathas been ploughed completely flat, or not formed at all intoridges. In this case the machine has a lateral implement ordrag connected with it, which can be removed to either side,and which makes a deep scratch or slight furrow in theground on one side of the machine, by means of which eachsuccessive bout is regulated, as the home is made to tread ex-actly on the scratch made during the preceding bout. Thiscircumstance requires considerable experience and very ac-curate attention in the person who leads the horse, that thework may be performed with perfect regularity; as otherwiseunseemly and unprofitable blanks will be left in some places,while in others the bouts will come too close together, or mayeven cross each other very awkwardly. Perhaps the difficul-ty of guiding the drill machine with accuracy, is a materialobstacle in the way of a more general adoption of the drillhusbandry in grain crops; and there is reason to believe thatthe practice, on that account, has lost ground in the bestmanaged districts of Scotland . '•
There has not been sufficient experience in drilling in Scot-land , nor any comparative experiments carefully made andrecorded, on which to found any decisive opinion respectingits superiority to broadcast sowing or otherwise. It may how-ever be observed, that by the drill mode of sowing, all theseed is completely covered up from the danger of being prey-ed upon by birds, and consequently that somewhat less seedmay suffice to the acre. It is not believed, however, that thiscircumstance is of sufficient importance in itself, to form a