,;. ,.;. II. CIMFFITHS AND Ml!. KXKIJ CKIFHTHS ON THE 



SECTION XII. 



Summary of Results. Copper. 

 The validity of our methods was rigorously tested by the determinations of the 



specific heat of copper at C. 



We have already, in the previous sections, discussed the various changes mad. 

 during the course of these experiments, and the table below summarises the results. 



TABLE XIX. 



Giving equal weight to each group, we have 



S = 0*09088 0'000047, i.e., probable error = 0'05 per cent. 



In Tables XX. to XXVII. we summarise our final conclusions. 



Messrs. Johnson and Matthey state that the previous treatment of all the metals, 

 except copper and iron, was as follows : 



''The cylinders in every instance were cast, and then allowed to cool, sub- 

 sequently being turned in a lathe, they were, not annealed." 



