i180. °° Proceedings of the Ninth [N.S., XVIII, 
But sc ge to chemical analysis satisfactory cement should be 
made fro 
(1) aes ae near Lucknow and the adjacent clay (see Hallidy’s 
report to the sana Board). 
(2) Kunkar ‘cin ne awnpore and Sutna limestone. 
ie opie ie made to prepare on a small scale satisfactory 
amples of t from these materia ta yer our experiences are des pen 
i regards a) catenating the correct proportion for the mixture ; (2) veffoc 
of varying the proportions on the properties of the cement; (3) effect of 
burning at diferent temperatures. 
Brominated Isocyamines —By K. L. MOUDGILL. 
Three bromoderivatives of sensitisers of Bye babs and gay 20 
type save been eserves sed and the influence of the presence of a 
of bromine in the ene ee of the qui addins sicrebaciel sbudied: The 
region of meelivencas. shifts towards the ae end of the spectrum and the 
intensity of sensitiveness is considerably reduced. 
Some induced oxidations.— By N. N. Mirrra. 
It has been observed that sodium sulphite, sodium phosphite, = 
formic sat can induce the reduction of mercuric chloride by sodiu 
arseni 
The oxidations of tise hydroxide, Sgeoingpe hydroxide, and man- 
ganous hydroxide can induce in each c the oxidation of potassium 
oxalate by oxygen ae 
Attempt has been made to explain these reactions. 
Tetramethyldiaminoacridine.—By K. L, MoupGILL. 
e different methods of preparation of the compound are described 
Thr 
and ke yields Sctio ed. The best results were given by the method 
outlined below 
" 4 Oe oe 
CH. 3 HCHO oe RN. (Mey 
REDUCTION 
ne we orem 
MeN | N.Me, 
New methods of preparation of 2; 4 dinitrodimethylaniline and 3: 3 
dinitro 4: 4’ tetramethyldiaminodiphenylmethane are describe d. 
Dyes from omnabenie anhydride.—By A. C. Sircak and 
S. B. Dur 
In this paper the — have shown that camphoric anhydride. ‘1 4 
made to condense with various hydroxy and amino compounds yie 
