1901.] Experimental Researches on Drawn Steel. 27 



masses of tellurium and iodine, &c, are further evidences of this.. 

 The properties of tellurium and iodine may have nothing whatever to 

 do with each other. They are, however, closely related to, and in 

 correct order with, those of the elements of their respective groups as 

 given above. The genesis was not in the direction of tellurium to 

 iodine, but from, or perhaps through, oxygen and fluorine respectively. 

 So also with regard to the other groups. 



It is more probable that in the genesis of the elements the properties 

 of certain fundamental substances are modified by successive additions 

 of matter to them,* or by causes of which this is, to us, the apparent 

 result. The regularity in the changes in the properties of lithium,, 

 beryllium, boron, and carbon, as seen in the diagrams, is very remark- 

 able. It is, furthermore, very suggestive, for the changes in properties 

 are approximately proportional to the quantity of matter in the atom 

 in excess of^a constant (which is about 6), as if it were the same matter 

 that is added in each case. 



I must express my best thanks to Dr. J. H. Vincent, to Professor 

 Liveing, Dr. Larmor, and Professor J. J. Thomson, for the interest they 

 have taken in this work, and for the kindly encouragement they gave 

 me, especially in the earlier stages of it. It was while working with 

 Professor Hartley that I acquired the knowledge of spectra which led 

 me to begin the investigation, and I am deeply grateful to him for the 

 means of acquiring that knowledge. 



" Experimental Eesearches on Drawn Steel. — Part I. Magnetism 

 and its Changes with Temperature. — Part II. Eesistivity, 

 Elasticity and Density, and the Temperature Coefficients of 

 Eesistivity and Elasticity." By J. Eeginald Ashwoeth. 

 Communicated by Professor Schustee, F.E.S. Eeceived 

 January 30,— Eead March 6, 1902. 



(Abstract.) 

 Part L 



In a former paper it was shown that the variation of the intensity of 

 magnetisation of a magnet under fluctuations of temperature is con- 

 trolled to a la»ge extent by the self-demagnetising factor of the 



* January 27, 1902. — Professor Hartley has recently called my attention to a 

 letter " On the Inadequacy of Aids and Facilities for Scientific Eesearch," which 

 he wrote to the ' Chemical News ' on November 9, 1895. The following statement 

 is quoted from that letter : — H One element in a group differs in its properties from, 

 another, not because it consists of another kind of matter, but because the quantity 

 of matter in an atom of it is different." 



