TREATING OF CONTRIVANCE 

 by the rhombus A, B, C, D, in fig. 6; for tho' its 

 angles be not squair, nor equal, yet its sides must 

 be equal, and angles opposite. And here it may be 

 varied according to the shape of the ground, by 

 stretching longer, or opening wider ; A C is its 

 breadth, and D B its length. Or you may also plant 

 by the rhomboides, as I have done in D A F E, and 

 consequently many more figures may be planted 

 thereby, as well as these varyed or altered, and yet 

 the whole continue in this regular order. 



In the third way, take an example in fig. 7, where 

 the length of one side must be divided by the deter- 

 mined distance, viz., the distance of the fence being 

 subtracted, the length of the side A B is 119, and I 

 designe to plant at eight and an half ells ; therefore 

 I divide 119, by 8, 5, decimally ; the product is 14 

 distances; then there will be 15 rows: here one side 

 is staked out, whereby you may plant the whole 

 plot thus ; take two distances on the chain, that is, 

 hold one end exactly at A and the other at C. Again, 

 with that measure on the chain, hold one end at the 

 first stake, A, and the other at the second, I ; cause 

 the third take the chain exactly by the middle, and 

 (holding it stiff) thrust in a straight stake at the 

 angle of the chain, N; so these three make an equi- 



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