SUBDIVISIONS OF THE UNITS OF LENGTH, ETC. 7 



in length, and 100 cm in breadth : hence, while the linear 

 metre contains 100 linear centimetres; the square 

 metre contains 100 x 100 = 10,000 square centimetres. 

 Similarly, a cubic decimetre is a cube of 10 cm in length 

 breadth, and thickness ; it contains, thereibre, 

 10x10x10= 1000 CC . The following table exhibits 

 the relative proportions of the subdivisions for the 

 various kinds of units 



Measures of Length. 

 Metre Decimetre Centimetre Millimetre 



1 10 100 1000 ' 



1 10 100 



1 10 



Measures of Area. 

 Square Metre Square Decimetre Square Centimetre Square Millimetre 



1 100 10,000 1,000,000 



1 100 10,000 



1 100 



Measures of Volume. 



Cubic Metre Cubic Decimetre Cubic Centimetre Cubic Millimetre 



1 1000 1,000,000 1,000,000,000 



1 1000 1,000,000 



1 1000 



The cubic decimetre when used for the measurement 

 of liquid bodies is called litre. A litre is thus equal to 

 1000 CC . 



2. Impenetrability. The sense of touch informs us 

 of another important property of bodies. If we attempt 

 to penetrate into the space occupied by a body, for 

 instance, by a piece of wood or stone, we either find it 

 altogether impossible, or, as in the case of a lump of 

 clay or water contained in a vessel, we only succeed in 

 placing our hand into the space occupied by the clay or 

 'the water, by actually pushing aside the substance, 



