42 PROCEEDINGS OP THE AMERICAN ACADEMY. 



0.6318 grin, substance lost 0.0450 grm. H 2 0. 



Calculated for C 4 U 4 (OC H 6 )BrO 3 . Found. 



H 2 6.59 7.12 



Baric a-phenoxy-fS-brom-y-oxycrotonate, Ba(C 4 H 3 (OC 6 H 5 )Br03)2 . 

 3 H 2 0. — The barium salt is readily soluble even in cold water, and 

 crystallizes in flat prisms with rectangular terminations. It apparently 

 contains three molecules of water, almost the whole of which it readily 

 loses over sulphuric acid. 



0.5891 grm. air-dried salt lost over sulphuric acid 0.0430 grm. H 2 0, 

 and at 100° it lost 0.0052 grm. H 2 in addition. 



Calculated for Ba(C 4 H 3 (OC 6 H 5 )Br0 3 ) 2 . 3 H 2 0. Found. 



H 2 7.35 8.18 



0.4939 grm. anhydrous salt gave 0.1677 grm. BaS0 4 . 



Calculated lor Ba(C 4 H 3 (0C 6 H 5 )Br0 3 ) 2 . Found. 



Ba 20.11 19.97 



The anhydrous salt dissolves without difficulty in strong alcohol, but 

 in a few moments the solution turns solid with the separation of finely 

 felted needles of a salt containing alcohol of crystallization. The 

 same salt may also be obtained by dissolving the hydrous salt in hot 

 alcohol. We have been unable to obtain satisfactory determinations 

 of the amount of alcohol which is thus taken up, since the salt efflo- 

 resces very rapidly on exposure to the air, and loses the last part of its 

 alcohol with great difficulty. 



a-PHENOXY-0-CHLORCROTONOLACTONE. 



It seemed to us desirable to confirm the results which we had ob- 

 tained with the phenoxybromcrotonolactone by preparing also the 

 corresponding bodies containing chlorine. Hill and Stevens had made 

 no experiments as to the action of potassic phenylate upon mucochloric 

 acid, but we found that mucophenoxychlonc acid could readily be 

 made in this way. As we were interested only in the preparation of 

 the phenoxychlorcrotonolactoue, Mr. H. P. Nash undertook a more 

 careful study of this acid, and will present his results in a separate 

 paper. From the mucophenoxychlonc acid we prepared without diffi- 

 culty the corresponding bromanhydride by the action of phosphorous 

 tribromide. The reaction ran smoothly, and gave us, as in the pre- 

 vious cases, which we have described more in detail, about 90 per cent 

 of the theoretical yield. The body was readily soluble in ether, 

 chloroform, benzol, or glacial acetic acid. It was very readily soluble 



