Domesday Statistics 23 



land ; where portion of what is estimated as arable Rotations, 

 is in grass, plainly less aration is demanded than 

 on a 2 or 3 course shift. As a rule, (i) wheat, 

 (2) barley and oats, (3) bare fallow would seem to 

 have been the rotation ; or a shift of (i) wheat, 

 barley, oats, (2) bare fallow ; and though there is 

 no great amount of precise evidence, the com- 

 parison of Teamlands and Teams on the whole 

 support the above. 



To bring the fifteen tables into fair comparison Method of 

 the following method has been used ; in each table Tables> 

 find a mean, and multiply same by a variable 

 figure to produce a new mean, in such a way that 

 the new means of each of the fifteen tables will be 

 nearly alike ; the new mean is then used for the 

 construction of the comparative lines, the results 

 from which are appended in percentages. Thus 

 taking population by teams in 30 counties (Com- 

 parative Table I.) the mean is 3*56 (Population by 

 Teams) ; the new mean is most conveniently taken 

 as between 440 and 450 ; and therefore the old 

 mean 3*56 is multiplied by 125, product being 

 445. To 445, additions and subtractions of 25, 

 50, 100, 150, 1 80, and 255 have been made ; the 

 results of which are now divided by the former 

 multiplier (125), enabling lines of 25, 50, etc., to 

 be drawn in the actual table as shown; with the 

 needful variations this convention has been used in 

 all the fifteen tables, in order to discover their 

 relative superiority. 



The first table plainly shows that to state that 

 William the Conqueror made the land to be 

 assessed on an entirely fresh set of units, or that he 



