1v CONTENTS, 
5. Emission and absorption spectra of the halogens in the 
visible and ultra-violet 7 ons. By A. L. tapes na and 
unnayya 
Oa moda se of mer slit spectrophotometer, By 
A. L. Nar 
7. sieiear ti in ie peial By R. Visciieiaibaiwden ae 
8. Thunderstorms in Trivandrum. By K. R. Ramanathan 
9. On upper air correlations. By P. C. Mahalanobis : 
10. On the craig of a coefficient of correlation for hae 
vati 
onalerrors. By P. C. Mahalanobis i 
ll. On the cual error of the component mem ca con- 
stants of a dissected sign curve. By P. C. Mahala- 
aie 
12. On the pevbalile error of cotiatnaite obeusea by (isle a in- 
terpolation. By P. C. Mahalanobis 
13. An automatic ‘‘ make and break ”’ key for fae’ eethig aid 
high enamel circuits "of a Cooledge X-ray tube. By E. 
Harrison and Narendranath Sen 
14. On the experim ay demonstration of the Temperature 
Radiation of Gases. By M. N. Saha 
15. Further ees on ery. mth 2's Physical Apparatus 
By 8. N. Maitra 
16, ee Pedal line eT at a triangle By rs Narasingn 
17. Some recent eicatehos at & Kodaikusiad. By J. ; ‘Rrerihed. 
18. The Albedo of the Earth. By C. V. Raman 
19. The Sone aie of — in Gases. ef K. R. 
Ramana bis 
Section of Chemistry. 
Presidential Address. By Dr. N. R. Dhar, F.I.C. 
Papers. 
|. Absorption of light by some acids and their salt meeps 
a new method of determining extinction-coefficient in the 
alta slst, By J. C. Ghosh 
2. West Coast Sardine nt By P. K. Racep: J. J. ihdlbox! 
ough and H. E. Wats 
3. a Note Paes a Chemistry of neem Soil, By P. 
mi Ayy 
Psy inven a tlie: composition of neem wit and the 
detection and removal of the —— By N. A. 
Yajnik ‘ad Sh. Md. Abdullah . 
5. Hydrogenation of oils. By J. W. P 
6. The reaction between sodium seinen and sulphur. By 
H. E. Watson and M. Rajagopalan 
7. tae of some reactions. Bs: R. a 
Bane . 
8. The equilibria um between t a snteeane of acetic <a and tri- 
choracetic acid and their esters. a D. D. Karve and 
J.J. Sudborough ‘ .- se 
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