476 Mr. S. S. Richardson on Magnetic Rotary 



small atomic weight and low valency. The refractive effect 

 of H is probably due entirely to electrons of class IV. The 

 values obtained by the ordinary " atomic " method do not 

 admit of any such interpretation, the value for H being 

 1*05 and that for C, an atom of 12 times the atomic weight 

 and 4 times the valency, being only 2*5. 



The subjoined table gives the values of P for a number of 

 aliphatic compounds calculated from 



(CC)= -415 



(CH) = 1-353 



(CO)= '574 



(OH) = 1-173 



2(CO) = 1-836 



C = 1-245 

 H= -087 

 = 1-013 



Table VIII. 



Substance. 



P (obs.). 



P (calc). 



Diff. 



ref. 



ref. 

 + •08 

 + 16 

 + -21 

 + •03 

 -•03 

 -•14 



ref. 

 + •05 

 -•16 

 -•04 



ref. 

 -•10 

 -•25 

 -•22 

 -•32 

 -•08 

 -•02 

 + •08 

 4- -01 

 -•25 

 -•08 

 -•04 

 -■27 

 + •03 

 -•11 

 -•17 

 +•16 

 + •16 

 -•11 

 -•34 

 -•01 

 -■31 

 -•25 



Pentane 



Hexane 



25-17 25-17 

 29-71 29-71 

 38-70 38-78 



i Octane 



■ Methyl alcohol 



8-25 

 12-74 

 1746 

 22-06 

 20-45 

 22-37 

 26-86 



8-54 

 12-96 



8-41 

 12-95 

 17-49 

 22-03 

 20-31 

 22-37 

 26-91 



8-38 

 12-92 

 17-46 

 22-00 

 26-54 

 31-08 

 35-62 

 22-00 

 11-51 

 16-05 

 20-59 

 25-13 

 34-21 

 1605 

 17-80 

 26-88 

 31-42 

 17-80 

 22-34 

 31-42 

 35-96 

 33-13 

 26-88 

 31-42 

 49-58 



Ethyl alcohol 



; Propyl alcohol 



n. Butyl alcohol 



Glycerine 



Ethyl ether 



Propyl-ethyl ether 



Formic acid 



Acetic acid 



Propionic acid 



17-46 

 22-10 

 26-79 

 31-30 

 35-94 



Butyric acid 



Valerianic acid 



Caprylic acid 



(Enanthylic acid 



1. Butyric acid 



Acetaldehyde 



22-08 

 11-53 

 15-97 

 20-58 

 25-38 

 34-29 

 1609 

 18-07 

 26-85 



j Propaldehyde 



Butyl aldehyde 



Vnleral 



(Enanthol 



Acetone 



Methyl acetate 



Methyl butyrate 



Methyl valerate 



31-53 

 17-97 

 22-18 

 31-26 

 36-07 

 33-47 

 26-89 

 3173 

 49-83 



Ethyl formate 



Ethyl acetate 



Ethyl butyrate 



Ethyl valerate 



Ethyl oxalate 



n. Propyl acetate 



Amyl formate 



Amyl valerate 





