( 688 ) 
ha (::)"= (:)"= 5) — 0.630. 
n 2 
a’ ny : 
The coefficients 4 and ZB then are pure numbers. Their values are 
A= + 2.381 
B= + 0.964. 
The meaning of the symbols ¢; occurring in A’ is 
hinde 
== Va 5 ES mm! 5 Pis 
or approximately 
1 
See 
The expressions of the various differential coefficients of A’ are: 
OR 2a; OR’ cosg; 1 OR 
da; air ese Va; &; de; 
OL; mi 
OR' 1 1 oF’ 
OT; rad mi Wai e; Òe; 
oR OR AR ÀR _ÒR DR 
ET UL 0m 0G) a 0 ne 
òR OR OR OR OR or OR 
pa Os as or ee 
dR OR OR OR OR 
dg, dw dg, ml dar ae 
Jl 
The quantities 8; and W; will be supposed to be correlated to the 
different elements as follows: 
To: DORI Dy Sr ae! ONS Peake Pars Fae yen ariel eet ote 
correspond : a ’ B, ’ B, ’ B, ’ B, ’ Be ’ B, ’ Be B, ’ Den 
and: Wi; wW, ’ w, ’ w, UW, 
If in R’ and its differential coefficients the elements are replaced 
by their unperturbed values, these funtions become constant. Con- 
sequently the first terms of the developments of the functions y; in 
’ We 1 w, ’ Ws ’ Ws ’ Wo 
powers of the masses are of the form 
jh 
| adik 
0 
where D represents a differential coefficient of A’ in which, after 
the differentiation, the unperturbed values of the elements have been 
substituted. 
Now we have 
