504 SEC. 13. CHEMISTRY. 



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

 Nos. 87 and 89.) 



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



2495. Poly-iodide of Dimethyl Thetine, obtained by the 

 slow action of hydriodic acid on the base dimethyl thetine. 



Not yet analysed. 



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

 Nos. 87 and 89.) 



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



2496. Nitrate of Dimethyl Thetine, obtained by the action 

 of nitrate of silver on hydrobromate of dimethyl thetine. The 

 specimen was crystallized from alcohol. 



CH 3 



Formula NO 3 IS 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. 



2497. Dimethyl Thetine, obtained by the action of water 

 and oxide of silver on the hydrobromate of dimethyl thetine, or 

 by the action of carbonate of barium on the sulphate. The base 

 loses a molecule of water at 100 C. 



CH 3 



Formula HO 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. 



2498. Lead Salt of Hydrobromate of Dimethyl Thetine, 



obtained by the action of the latter on carbonate of lead. The 

 specimen was crystallized from hot water. 

 CH 3 



Formula Br S CH 2 COOPbBr, 2PbBr 2 



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. 



