I. RESEARCH. 503 



2490. Dibenzyl Urea, obtained by the action of water on 

 isocyanate of benzyl. The specimen was crystallized from alcohol. 

 (See Journal of Chemical Society, June 1872.) 



Jbrmula C 



Dr. E. A. Letts and Mr. J. Fulton. 



2491. Isocyanate of Benzyl mixed with chloride of benzyl, 

 obtained by heating chloride of benzyl with cyanate of silver. The 

 isocyanate of benzyl cannot be obtained in the pure condition, as it 

 rapidly becomes polymerized into isocyanurate of benzyl. (See 

 Journal of Chemical Society, June 1872.) 



Formula of the isocyanate C 7 H 7 N = C = O 



Dr. E. A. Letts and Mr. J. Fulton. 



2492. Hydrobr ornate of Dimethyl Thetine, obtained by 

 the action of sulphide of methyl on bromacetic acid. The specimen 

 was crystallized from alcohol. (See Proceedings of Royal Society 

 of Edinburgh, vol. viii., Nos. 87 and 89.) 



CH 3 



I 

 Formula Br S CH 2 COOH 



CH 3 " 

 Professor A. Crum Brown and Dr. E. A. Letts. 



2493. Hydrochlorate of Dimethyl Thetine, obtained by 

 the action of chloride of barium on sulphate of dimethyl thetine. 

 The specimen was separated from an aqueous solution by a mix- 

 ture of alcohol and ether. 



CH 3 



I 

 Formula Cl - S - CH 2 -COOH 



CH 3 



(See Proceedings of the Royal Society of Edinburgh, vol. viii., 

 Nos. 87 and 89.) 



Professor A. Crum Brown and Dr. E. A. Letts. 



2494. Sulphate of Dimethyl Thetine, obtained by the 

 action of sulphate of silver on hydrobromate of dimethyl thetine. 

 The specimen was crystallized from water. 



CH 3 CH 3 



Formula HOO C CH 2 S SO 4 --S CH 2 COOH 

 CH 3 CH 3 



