252 



CREAMERY BUTTER .UAKIXG 



From the above it will be seen that one degree Centi- 

 grade is equivalent to 9-5 degrees Fahrenheit. Hence 

 the following rules : 



1. To change C. into F. reading, multiply by 9-5 and 

 add ^2. 



Example: 5()°C = (50 X |) + 32 = 112°F. 



2. To change F. into C. reading, subtract 32 and 

 multiply by 5-9. 



Example: 1S2^F = (1S2 - 32) X I =S3PC. 



^^ETRIC SVSTEJI OF WEIGHTS AND MEASURES. 



This system was devised by the French people and has 

 very extensive application wherever accuracy in weights 

 and measures is desired. Some of its equivalents in 

 ordinary weights and measures are given in the follow- 

 ing- table : 



Ordinary "weights and measures. 



1 ounce (av.) . 



1 quart 



1 gallon 



1 fluid ounce... 

 1 pound (av ). . 



1 grain 



1 inch 



1 foot 



Equivalents in metric system. 



28 35 grams. 



9J64 liter. 



3.7854 liters. 

 29.57 cubic centimetc-s (c.c.) 



0.4536 kilogram. 

 64,8 milligrams. 



2.54 centimeters. 



3048 meter. 



