INTRODUCTION 



1 milligramme 

 1 centigramme = 

 1 decigramme = 

 1 gramme 

 1 decagramme = 10 

 1 hectogramme = 100 

 1 kilogramme =1,000 



(Metric System) 



0*001 gramme 

 O'Ol 



o-i 



grammes 



0-015432 grain 

 0-154323 

 1-543235 ,; 

 15-43235 grains 

 154-3235 

 1543-235 

 15432-35 



2 Ib. 3 oz. 119-8 



Measures of Length 

 (English System) 



1 inch = 25*4 millimetres 



1 foot = 12 inches = 304-8 millimetres 



(Metric System) 



The standard of length is the metre ; subdivisions and multiples of which 

 with the prefixes milli-, centi-, and deci-, on the one hand, and deca-, hecto- 

 and kilo-, on the other, have the same relation to the metre as the subdivi- 

 sions and multiples of the gramme, in the table just given, have to the 

 gramme, thus : 



1 millimetre = O'OOl metre = 0-03937 inch 

 1 centimetre = 0-01 = 0-3937 

 1 decimetre = O'l = 3-93707 inches 

 1 metre = 39-37079 



1 minim = 



1 fluid drachm = 60 minims = 

 1 fluid ounce = 8 fluid drachms = 

 1 pint = 20 fluid ounces 

 1 gallon = 8 pints 



Measures of Capacity 

 (English System) 



= 0-59 cubic centimetre 

 3-549 cubic centimetres 

 28-398 

 567-936 



4-54837 litres 



(Metric System) 



In the metric system the measures of capacity are intimately connected 

 with the measures of length ; we -thus have cubic millimetres, cubic centi- 

 metres, and so forth. The standard of capacity is the litre, which is equal to 

 1,000 cubic centimetres ; and each cubic centimetre is the volume of 1 gramme 

 of distilled water at 4 C. 1 



1 cubic centimetre (generally written c.c.) = 16-931 minims. 



1 litre = 1,000 c.c. = 1 pint 15 oz. 2 drs. 11 rn. = 35-2154 fluid ounces. 



1 cubic inch = 16-365 c.c. 



THEEMOMETEIC SCALES 



The scale most frequently used in this country is the Fahrenheit scale ; 

 in this the freezing-point of water is 32, and the boiling point 212. On the 

 Continent the Eeaumur scale is largely employed, in which the freezing- 

 point is 0, and the boiling-point 80. In scientific work the Centigrade 



1 4 C. is the temperature at which water has the greatest density. For prac- 

 tical purposes measures are more often constructed so that a cubic centimetre holds 

 a gramme of water at 16 C., which is about the average temperature of rooms. 

 The true cubic centimetre contains only 0*999 gramme at 16 C 



