176 MR. J. WILSON OS BLEACHING. June 8, 



■big with important events. Rays of light break through 

 On every fide, and direft us in the way of improve- 

 ment. The lovers of fcitnce are invited into the field 

 of inveftigation. Tne friend of truth is encouraged to 

 inquire and perfevere. I am. Sir, with fentiments of 

 refpeft, your very humble fervant, 



J. Wilson. 



Remarks on ufeful Vegetable 'Juices infpi/J'ated, tout are 



the Native ProduBions of Europe. 

 As a fuppl^ment to the account that was given of the 

 claflic rcfin or coutchoi/c in a late number of this work, 

 (vol. ii. p. ICC.) it will be proper to mention feme of the 

 vegetable produftions of Europe, that have been found to 

 afford juices that poffefs fomeof the qualities of that fub- 

 ftr.nce. 



In Sweden, they obtain a juice from the Vifcum 

 uilbum Linn, the white mifletoe, which is faid to pofiefs 

 many of tlie properties of the Coutchouc. 



Mr. Faujas de St. Fond tried the glue of the Holly, 

 which v.e call hirdjlivie, for that purpofe. This is 

 prepared at Abbeville in Franct, from the inner bark 

 of the Holly, as an article for fale. In the ftate it is 

 oftered for fale, he obferves it contains a fuperabun- 

 dance of w^ter, and does not burn like elaftic gum, 

 when thrown upon a red hot coal, but by boiling it 

 for about an hour, it becomes then inflammable, and 

 burns with a clear flame, erriitting a fmell fimilar to' 

 that of elafi,ic gum when burning. This fubftance is 

 ir.foluble in water, or in ardent fpirits. It can be dif- 

 folved both in exprejfed and ejfentinl oils. With the 

 firfi, when prepared with litharge (ufually called dry- 

 ing oils) if forms a varnifli, in feme refpects anala- 

 gous to the elaftic gum, long indeed in drying like the 

 ■coutchouc varnifii ; but filks covered with it have the 

 fame brilliance, tranfpizrenc}-, flexibility ; the fame in- 

 permeability,- and the .fan^e facility of developing the 

 eledric fluid, as if ihey had been covered with cout- 

 chouc, which niakes it very proper for covering the 



