2,4 Numerical InftruSlionjf 



Before we go to great Examples, it will he necef- 

 fary to fay fomething of the Rijles of Pradtice an^ 

 Crofs-Multiplication, by which almoft all Quefti- 

 ons in this Matter are folv'd -, and thefe two Rules 

 are fo interwoven with one another, that they are 

 taught at one and the fame Time. 



The Learner is firft to be informed, that by Duo- 

 decimals, or Crofs-Multiplication, is meant the 

 multiplying Feet, Inches, and Parts, by Feet, In- 

 ches, and Parts, without Redudion, which favesat 

 great deal of Labour and Trouble, and is done in 

 fewer Figures. 



He is alfo to underftand, that the Rules of Pra- 

 Sfc:^ fhorten even that too, a^ will by and by very 

 plainly appear. He ought then, firft of all, to 

 learn the Aliquot, or even Parts of a Foot, which 

 is alfo applicable to a Shilling, 1 2 d. being a Shil- 

 ling, as 1 2 Inches is a Foot. He is alfo to learn 

 the Aliquot, or even Parts of a Pound. And thefe 

 three will dired the neareft Way of cafting up any 

 Dimenfions or Accounts in Gardening. 



Rides of PraBice, 



I hch 



1 or I is the 12th Part of a Shilling or Foot. 



2 or 2 is the 6 th Part of a Shilling or Foot. 



3 or 3 is the 4th Part of a Shilling or Foot. 



4 or 4 is the 3d Part of a Shilling or foot 

 6 or 6 is the half of a Shilling or Foot/ 



5 or 8 is the -f of a Shilling or Foot. 

 9 or 9 is the -4- of a Shilling or Foot. 



But ^s $d. -jd. jod. lid. are not yet number'dj 

 being odd, you muft account them thus : 

 d, htck . . 



5 of 5; is the -f and 4t of ^ Shilling or Foot. 

 7 or 7 is the i and t- of a Shilling or Foot. 



