CHLORAL RARE ESSENTIAL OILS. 



353 



gradual manner, and anaesthesia, less transient than that obtained 1869. 

 by inhalation of chloroform, would be produced. 



It was, in fact, found by experiment that hydrate of chloral Choral hy- 

 administered to rabbits produced profound sleep, and similar 

 results followed its administration to human beings. The first 

 case in which man was the subject was that of a lunatic, to 

 whom a dose 1*35 grammes of the hydrate was injected subcu- 

 taneously, the effect produced being a sleep of five hours' dura- 

 tion. An internal dose of 3*5 grammes given in a wineglassful 

 of water was followed by sleep which lasted for the rather 

 alarming period of sixteen hours. The ordinary dose recom- 

 mended by Dr. Liebreich, as an hypnotic, is 2*5 grammes, about 

 38 grains. 



1869. 



Rare Essential 

 Oils. 



RARE ESSENTIAL OILS. 



(Seltene dtherische Oele.) 



AT the same conference Mr. Hanbury exhibited to the meeting 

 authentic specimens of the following, viz. 



Essential Oil of Canella alba. 



Clove Bark or Culitlawang. 



Chian Turpentine. 



the leaves of Pinus sylvestris. 

 Pumilio. 



the cones of Abies pectinata. 



Ptychotis Ajowan. 



Origanum vulgare. 



Mexican Lignaloe. 



With regard to that obtained from the leaves of Pinus sylves- 

 tris, and sometimes called Fir-wood oil, he observed that, admin- 

 istered by inhalation, it has of late been recommended in certain 

 diseases of the throat and respiratory organs. 



Dr. Morell Mackenzie, by whom in this country it has been 

 chiefly prescribed, has also employed the essential oil of the Oil of pinus 

 leaves and twigs of Pinus Pumilio, a pine which covers many 



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