which I transplanted a single row of lucerne; others about three feet nine inches, into which I transplanted two rows and others about four feet three inches wide, in which I put three rows. The design of this variation was, to see by which of these three methods the same extent of ground would produce the greatest quantity of lucerne. I believe it will require five or six years to determine exactly which of them will be best; because, as the plants increase every year in bulk, their produce alters, and may perhaps not keep in proportion to their first years, though probably the difference would not be great." "The plants in the single rows were six inches asunder, nor should they ever be nearer; and those in the double and triple rows, were eight or nine inches distant from each other. I must observe, that I likewise sowed lucerne with the drill, in beds, in which it has remained without transplanting. It is very fine; but not near so strong and flourishing as that which I transplanted. When lucerne is sown where it is to remain, it necessarily requires being thinned, and that operation takes up more time than transplanting it would do." This led to the design of a series of rules to be observed in transplanting lucerne into beds: "The middle of the beds must be raised and arched as high as possible; and as the lucerne is to remain several years on the same ground, no pains should be spared to prepare the earth as well as can be." "Lucerne should be sown in the spring, and in a rich mould, that the plants may be strong enough to transplant in September." "3. Plants two or three years old may be transplanted as well as younger ones." Drill plough J. Balfour's Select Essays on Husbandry (1767), with extracts from the Museum Rusticum and other foreign essays on agriculture, mentioned the drill-ploughs invented by M. Duhamel and M. de Chateauvieux. "The gentlemen abroad who are now promoting the new husbandry, have gone into the practice of planting three rows upon every ridge, supporting that to be the best method; and the drill-ploughs invented by M. Du Hamel, and M. de Chateauvieux, are constructed to sow three rows. Mr Mills also, the editor of M. Du Hamel's Husbandry, tells us, that he declined giving a description of Mr