212 PROCEEDINGS OF THE AMERICAN ACADEMY 



ducts. This result is confirmed by the observation of Beilstein and 

 Kuhlberg,* that the more chlorine there was attached to the ring, the 

 harder it was to introduce chlorine into the side-chain. 



V. The mouobromtoluols seem to take up bromine (in the side- 

 chain) in the following order : para most rapidly, meta next, ortho least 

 rapidly. 



VI. The portion of Beilstein's Law which states that in presence of 

 iodine no benz}d-compound is formed, even at the boiling-point, is not 

 true when the amount of iodine is 10 per cent or less, and it is proba- 

 ble that toluol yields a little benzylbromide at 111°, even in presence 

 of 40 per cent of iodine. 



From our qeperiments, it follows that the best way of obtaining a 

 benzylbromide is to add the bromine at the boiling-point of the sub- 

 stance used, but it is not well to allow the temperature to rise above 

 this point, as then there is danger of decomposition of the product. 



* Ann. Chem. Pharm., cl. 286. 



