74 I.8.C. Proceedings of the Ninth [N.S., XVIII, 
4. Besides these, some minerals from Travancore and some samples 
of Bauxite from Kashmir State were examined and were found to show 
some activity. 
Poppy petals.— By J. N. Raxsuir and S. N. Sinaua. 
Poppy petals from several districts of nate United Provinces were 
examined for ash, ep invert sugar and tannin 
Note on the Liesegang Phenomenon.—By N. G. 
CHATTERJI. 
(1) Page of silver chromate takes place much better when sil- 
ver nitrate is added to a solution of potassium dichromate in gelatin 
a the re 
(2) Peptisation re the eo of cobalt, iron and other metals 
takes place in exactly the same way i oo of gelatin, agar-agar, 
i d 
hat of 
(3) iodic precipitation was observ aa the case of cobalt. 
hydroxide _ aoe tin and of mercuric iodide in silicic acid gel. 
4) eatin. is an important factor in the phenomenon of 
periodic paderrpiet n. 
pa soles fy and_ periodic pee: —By K. R. 
Krisana Atver and K, R AN. 
Periodic Cae similar to 3 observed in — (the 
Liesegang phenomenon) may be bro ought about even in the nce of 
ed. T t 
phenomenon is due to 0 spontaneous crystallisation from a supersaturated 
solution “i the metastable limit is upheld. PHstcarapt are shown In 
illustratio 
Some derivatives of carbamic esters. Chlorine as a simul- 
taneous oxidising and cigensing agent.—By R 
Datra and B. i “re TTERJE 
It has been found when chlo isda passed into carbamic 
= in alcoholic oatiae the alcohol is oxidised to the corresponding 
dehyde which immediately condenses with the carbamic esters to form 
dicarbami c esters 
methyl alcohol and ethyl carbamic ester, methylene diurethane 
Mss NH Soot i is formed. In a similar manner, the following 
tee aera have been prepared; methylene dicarbamic methyl estet 
OSs oar COOGEE » methylene dicarbamic propyl ester, ; 
CHa < nay. COUGH methylene dicarbamic isobuty! ester, 
CH < aia NH.COOC.H, methylene dicarbamic isoamy] ester, 
eer Ni. COOGsH benzylidene dicarbamic ethy! ester, 
NH.COOG,H,: 
Tn the case of apr Wai - ethyl alcohol medium, the alcohol gets 
chlorinated and at the same time oxidised to aldehyde which 
whic! 
condenses with omtiane. to toni rm dichloroethylidene diurethane 
