220 INTEGRAL ATOMIC WEIGHTS ^DODD. 



elements progresses, the Atomic Multiples either remain con- 

 stant or rise (with one exception). 



While they remain, constant, the melting point curve falls 

 rapidly. Where thej materially increase, the melting point 

 rises abruptly. Small increases only just chec-k the fall of the 

 melting point curve or may just give a slight rise, thus forming 

 the double periodicity humps. This is most readily seen by 

 marking the Atomic ]\Iultipks on a melting point curve. It 

 will be seen that in the 'ue instance where the Atomic 

 ^Multiple falls the melting point drops below zero. 



Specific Heat. 

 The Integral Atomic Weight of an element multiplied by 

 the specific heat of the element is a more constant quantity than 

 the ordinary atomic weight of an element multiplied by its 

 sipecific heat, the departure from a mean being reduced bv 

 about 30 per cent. In the lower parts of the scale the i-eduction 

 of variation is much more than this. 



Conclusions. 

 The author thinks there is strong evidence that these 

 suggested Integral Atomic Weights are a real function of 

 their respective elements, and if they be accepted the inferences 

 are : — 



(a) That the heavier elements are built up from the 

 lighter elements with probably hydrogen, helium, and 

 possibly lithitim laigely as constituents, these sub- 

 atoms being conjoined in some vibratory system 

 which renders a part of their material unnecessary to 

 the structure of the complex atom : for if the Atomic 

 ]\[ultiple. or the Tnteo'ral Atomic Weio-ht be t^ken 

 as proportional to the number of ultimate sub-atoms 

 constituting anv given ?tom. then the ex'^es'^ of these 

 magnitudes over th<^ accepted atomic weisrht may be 



