, Chemistry and Physics. 8 401 
7 
. * 
tion and eccentricity very small, a coincidence which is 
ped among the other known asteroids except in the orbit of 
yt, 
The orbit of Gerda is remarkable for having both the inclina- 
not 
n re-computing, for a check, the observations from the ele- 
aay the following insignificant differences remained (cale.— 
obs.) : - 
(122) Litres, 2928) 
Aa Ad 
Aug. 1 ~—001 -0%1 Aug. 1 —0°01 —0""1 
Aug. 28 —0-02 00 Aug. 27 —0-04 —0°2 
Sept. 24 ~0-04 —0'1 Sept. 22 —0°03 0:0 
The planet (124) (named Abeste) a few days ago reached its 
stationary point, so that now its right ascension is increasing. 
Its brightness, now about 11-2 magnitude, will permit observa- 
tions for some time yet. 
SCIENTIFIC: INTELLIGENCE. 
J. CHEMISTRY AND PHYSICS. 
1. On the Chemical Efficiency of Sunlight ; by Jamns Dewar 
Esq. (Phil. Mag., Oct. 1872.)—Of all the processes proposed to 
pot one has yet sed in strictly dynamical meas 
18 18 owing to the very small amount of energy to be measured 
necessitating very peculiar processes its recognition. The 
ecess ecul ; 
chemical actions generally induced by light are of the “Trigger” 
or “ Relay:” description—that is, bear no necessary relation to the 
i There is natural 
power envolved by the transformation. e one 
7 ” 
So far as I'am aware, the following passage, extracted from 
Helmholtz’s Lectures “On the Conservation of ine 
? F 
Must suppose that these chemical rays afford that amount of 
~ 
