350 ANALYSIS OF DEADLY NIGHTSHADE; 



Testimony of J. H. Browne, Esq., of Weymouth, certified, that he 

 had witnessed the principal experiments made by Mr. Way, 

 in extracting the turpentine from the Scotch firs. That the 

 trees had been planted in 1771 or 1772; and that the wood, 

 subsequent to the operation, had been minutely examined, 

 ' and found not to be injured by the extraction of the tur- 

 pentine. He added, that the season was uncommonly wet 

 and unfaYOurable for the experiment. 



Reference to the Description of Mr. H. B. Wai/^s Method 

 of procuring Turpentine from Fir Trees. Plate IX, 

 Fig. 4. 



a, Represents the lower part of a fir tree, as growing in 

 the earth ; b, shows the part where a portion of the bark 

 is taken off to assist the emission of the turpentine; c is a 

 hollow cut within the body of the tree, it is in the form of 

 a basin at the lower part to receive the turpentine, which 

 exsudes into it from the pores of the tree; this basin is 

 about six inches from the ground. 



IV. 



Analijsis of Deadly Nightshade, Atropa Belladonna; by 

 Mr. Vauquelin*. 



Deadly night- -"■ HE experiments I am about to relate were instituted 

 ahadeexamiried for the purpose of knowing, whether this plant, which is 

 principle of to- ^f the same family as tobacco, contained the acrid prin- 

 bacco. ciple, that we found in the latter +; but we shall see below, 



that it does not exist in them. However, I availed myself 

 of this opportunity to examine the properties of the mat- 

 ter in this plant, which, according to the physicians, is 

 narcotic. 

 Theiuice !• The expressed and filtered juice of belladonna has a 



pretty deep brown colour, and a bitter nauseous taste, 

 coagulated by I<^ is Copiously coagulated by heat, and by an aqueous 

 heat. infusion of gall. 



* Ann. de Chim. vol. Ixxii, p. 53. f See Journ. p. 260. 



2. The 



I 



