74 , MINUTES OF 



On the Construction of a Compound Roller. 



excellent work, and do a great deal of it. 



After the thistles are cut, they should lie a day or two, to perish by the loss 

 of sap juice, the ground must then be cleared and the close or field rolled the 

 cross way of the ridges with a very heavy roller, which so crushes the hollo>V 

 stumps, and renders them so pervio.us to water, that their roots soon rot and die. 



In order to expedite the opperation of the machine, and the destruction of 

 the weeds; the land should be cleaned of all kinds of rubbish, the latter end of 

 March or beginning of April, dressed with the sward-dresser, and then rolled 

 the cross way of the lands or ridges. 



Docks and nettles must be grubbed up by the root. 



DISSERTATION V. 



On the Construction of a Compound Roller, 



JL HIS machine is composed of a plain and spike roller in one frame, and is 

 one of the most useful implements of husbandry, especially upon strong clay soils j 

 Fig. 1. ' it may be used together or separately, and its weight may be accommoda- 

 ted to the nature of every kind of soil. 



Plate III. Fig. 1. Is a perspective view of the whole machine. 



A. is the spike roller, made of a piece of oak wood, seven feet long, and fif- 

 teen and a quarter inches diameter, hooped with iron at each end. 



Divide the circumference of this roller into twelve equal parts, from which 

 draw parallel lines, one division oblique, the whole length of the roller. 



On the first of these lines set off tAvo inches at each end, and divide the re- 

 mainder into twenty equal parts of four inches each. 



On the second line set off four inches at each end, and divide the remainder 



