exxii Proceedings of the Asiatic Society of Bengal. [N.S., XV, 
On the fundamental law of electrical action.—By M. N. 
SaHa. 
pon 
e time component) obtained by the phat is differe tion that 
i b r he 
n ta 
are then deduced from the Principle of Least ion. Tt i is t pages wn 
that the i Sr cea ebtained are simply a different form of ra “Min kow- 
skian Equati 
On some problems of spectral Boece M. N. Sana. 
ctr 
helium is next ¢ 
It is ray ai in the light of the quantum nS the problems 
classified :—(i) problems of general a 
i e. emission yen a system contain- 
0 atomic systems combined in a molecular gri 
ah wale with the quanta-conditions have also been 
inNaitigpace 
Notes on some newly designed physical apparatus.—By 
- N. Marrra. 
The paper contains a short descri iptive ae oe of aie g ee 
ments specially designed and made for lect e demonstrat (i) a 
differential ialuoene, (ii) a hydodynasiie ti m sas for sowie flow of 
heat along a bar hea © end, (iii) apparatus for exploring the 
perature tient along a hot bar, (iv) demonst tion apparatus for 
showing conductivities of r, ifferent metals, (v) a p r com- 
paring thermal conductivities by a null ethod, (vi) apparatus for show- 
ing the adiabatic heating of uddenly tehed Indi ber, (vii) 
apparatus to show a contraction of stretched I ubber on 
: oO ad of 1 
- iegoug and gas tourniquet, (x) appeceins to show the convection of 
i oe  aclge ®& Hew ase of anne and (xii) an apparatus to investigate the 
