393 



\VKIGHTS AM) MEASURES. 



4 

 5 



TABLES FOR CONVERTING FEKT INTO LINKS AND. LINKS INTO FEET. 



Links. Feet. Feel. Links, 



i = -66 I = 1-5151 



1-32 2 3 -0303 



= i "98 3 = 4'5454 



4 2-64 4 6-0606 



5 = 3'3<> 5 = 7'5757 



6 = 3-96 6 = 9-0909 



7 = 4-62 7 = 10-6060 



8 = 5-28 8 = 12-1212 



9 5'94 9 13-6363 

 10 = 6'6o 10 = i5' 1 5 I 5 



TIMBER MEASUREMENT. 



Take the average girth in inches, divide by 4, deduct i inch for 

 bark for each foot of circumference, and square the result : this 

 gives mean sectional area. Multiply this by length of tree in feet 

 and divide by 144 : the quotient = contents in cubic feet. Timber 

 less than 26 inches round the bark is not included in the length. 



IMPERIAL TROY WEIGHT. 



003961 cub. inch | . , \ 20 pennyweights I ounce (oz.) 



* of water f J feiai 12 ounces - i pound (Ib.) 



3' 1 7 grains - I carat I ounce - 480 grains 



24 grains - I pennyweight (dwt.) i pound - 5,760 grains 



The weight of a grain of wheat taken from the middle of the 

 ear, well dried, is " i grain." 



IMPERIAL AVOIRDUPOIS WEIGHT. 



27-34 grains (grs.) ... ... ... i drachm (dr.) 



16 drachms ... ... ... ... I ounce (oz.) 



16 ounces ... ... ... ... I pound (Ib.) 



14 pounds ... ... ... ... I stone (st.) 



28 pounds ... ... ... ... I quarter (qr.) 



4 quarters ... ... ... ... i hundredweight 



112 pounds ... ... ... ... I cwt. [ (cwt.) 



20 hundred weight ... ... ... I ton 



i ounce ... ... ... ... 473i grains 



i pound ... ... ... ... 7,000 grains. 



