35 i Description of an improved j^ppnralusfor dislilUn^. 



who are interested in such improvements may see the apparatus 

 at u'ork at the premises of the patentee, No. 63, Whitechapc^I, 

 London, who has the permission of tlie Honourable Coniniis- 

 sioners of His Majesty's Excise to erect liis improved apparatus 

 for distilhng, for the use of distillers, rectifiers, S:c. 



Copy of a Letter from Joseph Benvvki.l, Esq. {a Gentleman 

 of long Experience, and of great piactical Skill, in the Eng- 

 lish Mult Distillery,) addressed to Mr. HfiNRY TRlTTONfO?i 

 the Subject of his Patent improved .dpparatus for Distilling. 



Henley, Oct. 9, 1817. 

 Dear Sir, — Having attended repeated trials made with your 

 apparatus for producing a vacuum and distilling by the com- 

 bination of the balneum with the air-pump, and having consi- 

 dered the principle thereof, — I feel much satisfaction in commu- 

 nicating my full conviction, that it is a mode by which a piuer 

 .spirit will be extracted, than by any other that has been hitherto 

 practised ; that a considerably less proportion of fuel will be re- 

 quisite, and that the operation may be performed with equal fa- 

 cility. I remain, 



Dear sir, yours very sincerely, 



Joseph Benwell. 

 To Henry Tritton, Esq. 



Copy of a Letter from iV/r. Wxiiiam Ali.v.'s, {Fellotu of the 

 Royal and Linncean Societies,) addressed to Mr. Henrv 

 Tritton, on the Subject of his Patent improved Apparatus 

 for Distilling. 



Plougli Court, Lombard Street, Oct. 7, 1817- 

 Mv Dear Friend, — I consider that the plan for producing 

 a vacuum, or even a partial vacuum, in the vessels destined tJ 

 receive the products of distillation, is a great improvement: for, 

 in proportion as the vacuum is rendered more perfect, the spirit 

 will be drawn over at a lower temperature, and will be more 

 fragrant, and better in every respect ; and the still being sur- 

 rounded with water, the heat can never rise beyond two hundreti 

 and twelve degrees; and consequently, that unpleasant smei! 

 which the spirit always has when the matter in the still is over- 

 heated or burnt to the bottom, is entirely avoided. It is furthet 

 obvious, that upon this plan distillation may be carried on with 

 a smaller expenditure of fuel than upon the old s}stem. 

 I remain, thine sincerely, 



Wn.i.tAM Allen. 

 To Henry Tritton. 



LXI. Account 



