218 THE ORCHID ACE.E OF THE 



Experiment with a Mixture of Alkaloids. 



In order to subject the microscopic method of identification to 

 a severe test, the following mixture was made : — 



Morphine, Narcotine, Codeine, Narceine, Papaverine, Thebaine, 

 Meconine, INIeconic Acid, Cinchonine, Cinchonidine, Quinidine. 

 Quinine Sulphate, Atrophine, Brucine Sulphate, Strychnine, San- 

 tonine, Cantharidine, Theobromine, Theine, Piperine, Salicine, 

 Picrotoxine, Coneine, Hydrobromine, Aloeine, and Picric Acid. 



This was treated ^7 la Dragendorff. 



The petroleum ether extract from an acid solution was recrys- 

 tallised from ether, and yielded crystals recognised as those of 

 Piperine and Picric Acid. 



The Benzole extract from the acid solution was recrystallised 

 from ether and from chloroform, and yielded crystals of Picric 

 Acid, Santonine, Aloeine, and Cantharidine 



The chloroformic and other extracts yielded crystals, which 

 could not be identified, with the exception of Narcotine. 



This experiment was really too severe a test. It is unnecessary 

 to state that no such admixture would occur in practice. 



^be ©rcbibace^ of tbc Batb ]flora, 

 jfcrtilieation, etc 



By William G. Wheatcroft. 



Plates 23, 24, 25. 



PROFESSOR BABBINCrTON, in his " Flora Bathoniensis," 

 published in 1834, and the suj)plement thereto, ])ublishcd 

 some years later, describes 19 species of British Orchids as 

 growing within the Bath district. These are : — OrcJiis ^norio, O. 

 yuastula, O. iistiilata^ O. pyramidalis^ O. lalifo/ia, O. //laculafa, 

 Gy/nnadenia conopsea, Herniiniuni monorchism Habenaria viridis^ 



