

These molecules and atom* arc what we are dealing 

 with, and the nc minuteness it i-. which makes it so 



difficult for the mind to conceive them, and to u: 

 in any way the part they pl.t 



We construct four cubes, one each of Iron. \, in 



J< inch, .mil one each in i inch cubes. 



> of each, and placing all at the same 

 <m the heated su re find that with the \i 



cubes the wax on the top of the /.A melts fust . but with 

 the i inch cubes the wax on the Iron melts before the wax 



Now we const! bars % inch square, one of soft 



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'nc-antimony, and fix upon each bar peas, 

 aling wax, or any suitable mat 



apart, the bars being held by con . \\ e light 



a Bunsen bu: roducc the i place it exactly 



in the centre of the space between the two bars What 



be results? Of course, if we had not tried the cubes 



:iment we should h. that the Iron, being the 



i conductor, would take the t ; but no, to our 



surprise, the peas on the bar of /A fall first, about in 



this ord. 



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