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CONTENTS. 
Coagulation of manganese dioxide sol by different electro. 
lytes. By P. B. Ganguly : 
Some yia - of the menthyl esters i ome “ unsatura- 
cids and of their sittitewll analogies. By B. 
Buseanchir and J. J. Sudborough 
An attempt to prepare red sulphide dyes in om dyes of 
other groups by ane cing the auxochromes by mercaptan 
groups. By E. R. Watson and Sikhi Poaman Dutt .% 
An attempt to abies red sulphide dyes by Doig Oe 
mercaptan groups into dyes of the azine, oxazine, phtha 
lein acridine and nitroso. groups. Soe E. R. Watson and 
Sikhi Bhusan Dut 
The Preparation se vilbouetia of akouler ‘ooutateling 
hess Groupes E. R. Watson and Sikhi Bhusan 
Dut 
hn ne of nitric acid « on meta ‘iad some alloys By 
. C. Banerji 
one of ferrous valptiats by air. By P. K. Banerji.. 
Studies on the Dependence of Optical Rotatory Power on 
Chemical Conatiiainies Part IV: The Rotatory Powers of 
Aryl Derivatives of Hisimino-and ami perenpe By B. 
K. Singh, M. Singh and J. Lal 
bs production of acetone - rom acetates an aoe aaa 
y M. J. Kekre, J. J. Sadborouph raid 1 E. W 
cian Observation on a pe Priam: phenomenon 
By P.B Gansils and B. c. Bane 
prions, tension of Soap Solutions ise different denies 
tions. By A. arayana and G. Subrahmany 
Molecular ‘Conductivity of potassium iodide in organic 
solve By N. A. Yajnik and B. R. Sobti 
Study in _visooitio of cobalt, copper and mercuric hic. 
rides with a to find the constitution of the complex- 
ions formed He be solutions. By N. A. Yajnik and Ram 
Lal Ubero 
On the ae ‘of Sicctaaiel at high temperatures By 
M. Raman Nair and H. E. Wats 
ionic A of some Indian mineral By N. A. Yajnik 
aS. J. Kohli 
a petals. By J. N. Rakshit we S. N. Singha 
Note on the Liesegang Phenomenon. By N. G. Chatterji. 
Supersaturation and_ periodic — wei K. 
Krishna Aiyar and K. R. Ram 
ters. — as a simul- 
Some derivatives of carbamic es By RL + Datta 

and B. C. Chatterji 
Purification of crude nitre. _ B. Ganapathi Rao, J. J. 
Sudborough and H. E. Watso 
The extent and character of reh alee of the United 
ine oh the oveibilities of their commercial geet 
By E. R. Watson and . C. Mukerji 
The rn Be of trinitrotoluene from Assam and Burma 
petroleum. By E. R. Watson’ .-. se es 
