914 Dr. R. D. Kleeman on the Attraction Constant of a 



T 

 v / — being exactly additive, probably indicates certain 



deviations in chemical properties of the substances. 



The values of II and C, it shot; 

 increase of atomic weight. 



should be noticed, increase with 



Ethers. 



The chemical equation for the ethers contained in Table VI. 

 may be written «C + £H + 0, where a and /S are integers. 



From what has gone before we should expect that there 

 exists a relation of the form 



T 



A 4 -aC-/ffl-0=(A 4 -0)-«C-/3H=^ c -. 



The values of (A., — ()). (\ and H, determined from the 

 four ethers, arc 3487, —-27 7. and 1 959 respectively. The 

 values of the left-hand side of the latter equation calculated 

 by means of these quantities are given in the fifth column of 



T 

 the table, and agree Eairly well with the values of ^ / — • 



The values obtained for II and C decrease algebraically with 

 increase o£ atomic weight. The opposite occurs, we have 

 seen, when H and (' occur in the equation for the nitrites. 



Table VI. 



Substance. 



T, 



r v//< r 



T, 



(A 4 -0) 

 -aC-/3H. 



(A 5 -0) 

 -(C+2H). 



AUyl ethyl ether, O d H 10 O ... 



518 



3130 



1655 



16-66 





Methyl ethyl ether, C 3 H 8 ... 



440-7 



22-38 



19 70 



2003 



20-07 



Methyl ether, C,H 6 ... 



4026 



16-92 



23-79 



2367 



2360 



Ethyl oxide, C 4 H j0 O •• 



! 4656 



2784 



16-73 



16-29 



16 55 



The chemical equation for the three eihers at the end 



of the table may be written + a(C + 2H), and we have 



T c 

 accordingly (A 6 — 0) — a(C + 2H) = ^ — ^ 5 where A 5 is a 



constant. The values of (A 5 — 0) and (C-f 2H) were found 

 to be equal to 30*64: and 3'522 respectively. The values of 

 the leit-hand side of the above equation ca]cu ] ated by means 

 of these quantities will be seen to agree well with the values of 



