SClENftPlC ISIEWS. f^S"^ 



Having dlftllled a certain quantity of the plant with water, Affords an 

 the produa had a powerful and agreeable fmell, but I could J^^'^no'^effrnS*' 

 not difcover the lead trace of elTential oil on it. oil. 



The juice of St. John's wort does not dilTolve either in ex- The juice doe» 

 prefled or in etTential oils, but it unites very well with refins. "f ^^^^'^e.'" 



•' oils, but unites 



For this purpole, the juice of the plant muft be dried; which with refms. 



may be done' very conveniently by expreffine it into earthen ^^'^^ of com- 

 ,; ji-,r- r ■ n ,. . biningthem. 



plates, and placing thefe m an oven feme time after the bread 



is drawn ; it muft then be powdered, and will readily combine 



with turpentine by rubbing them together in a brafs mortar 



warmed. This refin, thus faturated with the juice, may be Oilof St. John's 



mixed with oils, either ellential orexprefTed ; and on combining ^°'''' 



it with oil of olives, the oil of St. John's wort of the fliops may 



be formed, which, thus prepared, poiTedes evident virtues. 



If it be incorporated with linfeed oil, and a fmall portion of Mal<es a fine 



oil of turpentine be added, a fine red varnith is producecf, ^00^'"''^ *°'^ 



which may be advantageoufly employed for coating articles of 



furniture made of wood. 



Mk. RICHARD KNIGHT, who is well known to the 

 philofophical world for the very complete Magazine of Chemi- 

 cal Apparatus of all kinds he has for feveral years paft efla- 

 bliflied in Fofter-Lane, has favoured me with a letter, in which 

 he very fatisfa6lorily fliews that the inftrument in Plate X. of 

 our laft number, was not invented by Mr. Accum, but by 

 Mr. W. H. Pepys, about three years ago, and has ever lince 

 been an article on fale in the catalogue of his warehoufe. The 

 title to Mr. Accum's paper was written by myfelf, as almoft 

 all the titles are; and I was led to call him the inventor from 

 the tenor of his paper. Immediately after the publication of 

 laft number, and before I had received any letter from Mr. 

 Knight, Mr. Accum obferved to me, that he is not the inventor, 

 and that he firft faw the inftrument defcribed in a German 

 paper. At the fame time therefore that I have the pleafure to 

 give Mr. Pepys the undifputed right to a contrivance which, 

 in point of utility and convenience, is of confiderable value, 

 I do not fee any moral error that needs corre6iion. 



ACCOUNT 



