8 Art. 3.— Y. Sbibata : 



The substance is, therefore probably, diethylapocampholide. That 

 tliis substance is a lactone may easily be proved by the action of 

 alkali on it. 



Tlie action of alcoliolic votaslt on àictlujlapocamplioUAc : — By the 

 action of alcoholic potash on diethylapocampholide, after the 

 usual treatment, white precipitates were obtained on acidification. 

 The precipitates, on standing over night, crystallised in feathery 

 needles, melting at 60", with the following composition: — 



0-0797 gave 0-2173 CO, and 0-0770 H.O. C = 74-36 ; H= 10-80. 

 CioH,,20, requeris C=74-2I ; H = l0-56 per cent. 



The substance is, no doubt, nothing but the original substance, 

 and the oxy-acid, first produced by the action of alcoholic potash, 

 must have been brought back again into its lactone by the action 

 of an excess of hydrochloric acid. 



The Action of Magnesium Methyl Iodide 

 on Dimethyl d-Camphorate. 



By the action of magnesium metliyl iodide on dimethyl 

 camphorate, carried out in the usual manner, an oily substance 

 was obtained, almost all of which distilled with steam. The oil was 

 extracted witli ether from tlie distillate, and was fractionated under 

 a reduced pressure of 10 mm., after driving off the ether. The 

 main part distilled at 145-147-5° as a colourless oil with a faint 

 odour like turpentine oil. On analysis it gave the following results, 

 agreeing well with the composition of dimethylcampholide: — ■ 



0-3520 gave 0-9434 CO, and 0-3226 H.,0. C = 73-10 ; H = 10-25. 

 CiÄoO-, requires C = 73-39 ; H= 10-30 per cent. 



G. KoMPi'A (Ber., 1908, 41, 1039) obtained dimethylcam- 

 pholide in crystalline from with a melting point of 83*5-85°by the 



