Prof. T. Carnelley on the Periodic Laic. 



497 



Table II. — Showing the effect of Length and of Hardness 

 on the Induction-Coefficient of Magnets. 



Length 

 of bar in 



Ratio of 

 length to 



Unit field. 



Mean of 

 numbers in 



Magnetic 

 moment 







Apparent 

 percentage 



Apparent 

 percentage 





centi- 



increase of 



increase of 



columns 



per 



gramme. 



Remarks. 



metres. 



diameter. 



moment for 

 unit field: 



moment for 

 unit field : 



3 and 4. 









side-on 



end-on 













position. 



position. 









3 



10 



0-80 



0-90 



0-85 



27 



Glass hard 



4 



16 



067 



0*73 



070 



32 





4 



16 



067 



0-70 



0-69 



35 







. 6 



20 



0-51 



67 



0-59 



36 







7 



31 



051 



0-58 



054 



39 







8 



32 



0-51 



0-58 



0-54 



54 







8 



32 



0-51 



0-58 



0-54 



52 







10 



34 



9-46 



0-56 



0-51 



40 







10 



44 



0-40 



0-56 



0-48 



43 







7 



47 



046 



0-51 



0-49 



57 







10 



50 



0-44 



0-58 



051 



67 







10 



50 



048 



054 



0-51 



60 







10 



50 



0-46 



0-55 



0-51 



53 







10 



50 



0-46 



0-52 



049 



71 







10 



50 



0-46 



0-56 



0-51 



60 







10 



67 



0-41 



0-51 



0-46 



65 







7 



73 



0-41 



050 



0-47 



64 







10 



105 



042 



0-45 



0-43 



66 







10 



34 



0-47 



053 



0-50 



41-5 



Grlass hard. 



10 



34 



0-63 



0-67 



0'65 



44-5 



Yellow. 



10 



34 



0-84 



0-98 



0-91 



54*1 



Blue. 



10 



48 



0*32 



0-40 



0-36 



45 



Grlass hard. 



10 



48 



0-43 



055 



0-49 



46 



Yellow. 



10 



48 



053 



067 



060 



71 



Blue. 



LX. The Periodic Law, as Illustrated by certain Physical 

 Properties of Organic Compounds. — Part II. The Melting- 

 and Boiling-points of the Halogen and Alkyl Compounds of 

 the Hydrocarbon Radicals. By Thomas Carnelley, D.Sc. y 

 Professor of Chemistry in University College, Dundee*. 



IN the present series of papers my object is to determine 

 whether the elements are in any way analogous to the 

 hydrocarbon radicals of Organic Chemistry. For this purpose 



* Communicated by the Author. 



