1922.] Indian Science Congress. 1.8.0. 75 
CHCl.CH < NH COOH: In the case of substituted urethanes such 
as phenyl aoe, and a- pig ih -urethane, th type 
of reaction takes place but ~ = seativity ot oe 
aromatic groups, they get seipniated a th e With phe 
urethane in methyl alcohol, methylene ai- Vii tishecoheetaes 
6 . i P : 
C H Cl.NCOOC,H; is formed. With o-naphthylurethane and 
Cc 
methyl] alcohol, methylene  di-tetrachloro-a-naphthyl diurethane 
CH,< CO ELCLN, COOCH? is produced. The above type of condensations 
falls es in the case of secondary alco 
has also been found in this con ecsncee that ethyl neh ebm 
sacsaaate ester undergoes ydretyals to a cyclic compound, diethy-4- 
cloro-methy! cyclomethylene hydrazine imide  1°3- areachuiylots 
N.COOC,H, 
CH,C1CH< > NH which form an imide chloride and an acetyl 
COOC, 
derivative. Dichlormethylearbamic ester, NCly.COOCH3 has also been 
prepared for the first time os ing chlorine through an aqueous solu- 
tion of methyl carbamic ester 
Purification of crude eet B. GanapatHi Rao, 
J. J. SupporoveH and H. E. Watson. 
The refining of crude nitre at temperatures between 55 and 100°C 
has bee “Wied with the object of obtaining a purified product containing 
as little sodium chloride as possible. The solubility values of sodium 
chloride in saturated potassium nitrate solutions determined by Etard 
Ann, m. P 
mpera- 
ture for the dige An efficient method has been worked out 
whereby, by one crystallisation white crystals of nitre can be o 00m _ 
containing not more than 0-2 per jcent ium ch] hloride, whi net the 
amount of potassium nitrate in the residue or ‘sitta’ is recap 
w 3 per cent which is equal to a loss of 5 per cent of the tota 
nineties 
Th De aofubiltiia (in water) of the following three of borg tet 
cheats 4: (2) NasSO,, KNO3; (3) ape NaCl, KNOg have ; — es 
ined between the tempe aratures 22° 5°C. The possibility o (a) - a 
sulphate —- with the eae of nitre and (6) ome . omc rs 
position between the salts present has been cenbilecell Atten 
drawn to the capeetestti of the latter in pointer of extraction. 
The extent and character of the Teh deposits of the 
United Provinces and the possibilites of - . 
cial utilisation—By E. B. WaTSON @ pot. 
MUKERJEF. ae 
les taken from tho large usar plain 
Cinmighoes a Loeeee ke was found that not all usar plains contain 
ence esa na es onal all the main lines of rail in the province and 
the areas re efflorescence were no 
