Laws of Molecular Force. 269 



Table XXVI.— Dynic Equivalents. 



CH 2 . 

 10 



II. 



0. 



C"0'. 



0'. 



NH 2 . 



1-23 



ON. 



•215 



•57 



19 



•6 



1-35 



N0 3 . 



CNS. 



S'. 



CI. 



Br. 



I. 



2-2 



2-85 



1-6 



1-3 



1-6 



2-3 



To illustrate the applicability of these values, I furnish a 

 comparison of the values calculated by means of them for 

 tvventv substances with the values tabulated in Table XXV. 



Table XXYII. 

 Comparison of calculated and tabulated Dynic Equivalents. 



C 6 H 6 



10 H U ... 

 3 H 7 C1 .. 

 C 5 H n Cl .. 

 2 H 5 Br .. 

 C 5 H u Br.. 



2 H 5 r 



C 5 H n I .. 

 KH,C 3 H 7 

 NH 2 C 5 H n 



Calc. 



Tab. 



4-75 



8-75 



4-3 



645 



35 



645 



43 



7-35 



425 



63 



4-8 



8-8 



43 



6-3 



36 



G-6 



4-3 



7-3 



4 23 



6-23 



C 4 H 9 CN 



4 H 10 S 



C 2 H 5 CNS .. 



(OH 3 ) 2 



CH 3 C 5 H u O 



C 6 H 12 3 



(0H 3 CO) 2 O 

 C 4 H 9 COH.. 



4 H 8 O 2 



7 H 14 O 2 



Calc. 



Tab. 



535 



5-3 



5-6 



56 



4-85 



48 



2-6 



2-6 



66 



60 



7-8 



7-7 



5-2 



5-4 



5-3 



51 



4-9 



49 



7-9 



7-9 





If we now look at the dynic equivalents of the uncombined 

 elements given in the first part of Table XXV., we may notice 

 that they are remarkably small compared to the values in the 

 combined state ; thus, that of H 2 is '04, of N 2 *205, of 2 

 •195, and that of CH 4 is small too, *35, instead of 1 as it 

 should be, seeing that CH 4 is the first of the paraffin series. 

 Other typical compounds have small values : C0 2 has 1*05, 

 while CO"0' in more elaborate compounds has a value 1*9, 

 C 2 H 4 has 1, while C 2 H 6 has 2 ; and so on. The same fact has 

 been noticed in connexion with the molecular refraction of 

 some of the typical compounds and some of their immediate 

 derivatives, and it will yet prove a most important one in 

 chemical dynamics. But meanwhile it is of greater importance 



