exx Proceedings of the Asiatic Society of Bengal. [N.S., XVII, 
5. Newton’s Diffusion-rings and Quetelet’s Phenomenon.--Thee xpla- 
nation usually advanced of this 3 phenomenon is that the light, regularly 
transmitted throu e eri he mirror at entry and diff 
at emergence, interferes with the light diffracted at ent ry and regularly 
transmitted at e gene tual practice, however, the d ting 
7 t 
the mirror, ere hence the diffraction must be nea to oceur both 
at entry and at emergence. he modifications o ory necessitated 
by~ ay are supported by the experimental Riis obtained by the 
aut — 
ller —— of these investigations is appearing in the Philo- 
Sed eT Magazin 
On the Characteristics of Indian Stringed Instruments.— 
a C. V. Raman. 
In this paper, attention is drawn to the remarkable results produced 
by the brands form of bridge used in the Indian ‘‘ Tamburn” in which 
the m atal strin ass over the curved surface of a wooden bridge 
an adjustment is provided for varying the contact of string and bridge 
by silk or woolen thre slipped in between them is found that th 
Young-Helm law, according to which the harmonics node 
at the plucked t elicited, is completely set aside as the 
result of a pin | ment, and a complete and powerful retinue of 
ertones tually manufactured by the intermittent conta f 
y contact o 
string and "iets. With proper adjustments, a fine quality of musical 
tone results, 
The elements of discomfort indoors in na ee dis- 
cussion inaugurated — By FE. P. Harey 
ran ePoaretseal examination was made of the conditions as regar rds 
<< prevailing inside an enclosure roo d en essing a 
Site, ts roof being exposed to the sun’s rays during the It was 
Sohcludad | ~ the temperature of a body inside a room epee on :— 
(i) t eer ey ure of the external roof cov 
ing ; 
(ii) oad material and sea on of the Wieteces inner and outer, of 
© external roof co ering ; 
(iii) erties and sondtiion of the upper and lower surfaces of 
Hence the best rip iites roof was shown to consist of bright oS 
rugated iron sheet on rage ag. several feet below which is 
ceiling of wood Salts ted white both sides with spi paint (lead 
paints are bad in hot pidge scion they are good — rs). 
as i ut that 
erre xpe ss with the 
object of separating the measure of di a radiation given out by roof 
and walls from » effect of conduction, convection and evaporation at 
the body erties * 
