PATENT AGENCY AND COMMISSION OFFICE, 

 11, Covent Garden Chambers, London.. 



MR. GILL, who has constantly made scieixtific pursuits the chief ob- 

 iects of his study, &nd in situations peculiarly favourable to their 

 c-.;lriv;"ti.;n ; particularly, as a Member and President of the London Phi- 

 losophkal Society ; and during 7nany years in which he has been honoured 

 with xit^: important office, of a Chairman of the Committee oi Mechanics in 

 the Society for the Encouragement of Arts, Manufactures, and Commerce 

 oi London ; most respectfully offers his Agency to Patentees, or to Per- ■ 



•«ons intending to take out Patents ; and part,icularly, in the following in* 

 stances : 



In affording tliem an opportiniit* of disclosing in confidence, the nature 



- of their Inventions, ^nd obtaining the best information in his power to af- 

 ford them from his own experience, ■ or to procure within the extensive 

 circle of his acquaintance M'ith scientific men, in the several departments of 

 Mechanics Chemistry, Metaliurgy, Sec, and thereby avoiding, the not Mi- 

 frequenc -.-noniiication of finding out, when V'.c, late, and the specification 

 js made public; that they have been employing their money, time and 

 labour, in old and unprofitable pursuits. — In specifying the Inventions, so, 

 as on the oae handj^to secure the principle-i and various applications of 

 the Discoveries, and, on the other, to avoid a dangerous prolixity. — I-a 

 making Experiments, Models, or Drawings, when necessary to elucidate 

 them ; and in pointing out those Engineers, Mechanists, &c. of the greatest 

 skill and celebi Ity ; and who are most capable &f carrying the Inventions 

 into effect. — In bringing the Inventions within the notice of monied men, 

 likely to embark their capitals in such undertakings. — I-n atteixling as a 

 witness in Courts of Law, on contested Patents. — In the sale of Patent 

 Articles, and the disposal of Patent Rights, on Commission. — And in such 

 other services, 'as his qualifications may render acceptable to Patentees, or 

 to the Gentlemen their legal advisers.— His terms will, he trusts, be found 

 liberal, and. may be known, on application at the office, if by letter, post 



• paid. OflRce Hours, from ten to three o'clock. 



Just completed, in 32 Volumes, 8vo. price 12s. each, in boards, 



THE GENERAL BIOGRAPHICAL DICTIONARY, containing 

 an Historical and Critical Account of the Lives and VYritings of 

 the most eminent Persons in every Nation, particularly the- British and 

 Iiish; from the earliest Accounts to the present Tin;e. 

 A New Edition, Revised and Enlargifd, 

 By ALEXANDER CHALMERS, F.S.A. 



*»* The presciit Edition has been augmented by SOSl* additional Lives ; 

 and of the remaining number, 2176 have been re-written, and the whole 

 revised and corrected. The total number of Avticles exceeds 9000. In 

 the Memoirs of Authors, their Works are enumerated, with the dates of 

 publication ; and in proportioning the length of an Article to the interest 

 of the subject, a due consistency, it is hoped, has been preserved. Ap-. 

 pended to each Article are copious refcinces to the sources whence the- 

 maierials are derived. 



Gentlemen who have purchased tl>e Volumes periodically, are requested 

 speedily to completv tlieir t'-'t;, as this may heie;ifter be rendered difficult. 



Published by J. Nic.iolr, and Son ; \\ C. and J. Rivington ; T. Payne ; 

 J. Otridge; G. and W, Nicol ; G. Wilki.-; J. Walker; W. Lowndes; 

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 Hurst, Rees, Orme, and Brown; Cadelland Davies ; Law and Whittaker; 

 J. Booker; J. Cuthell; Clarke and Sons; J. and A. Ai;ch ; J. Harris; 

 Black, Parbury, aud Allen ; J. Black and Son ; J. Booth ; J. Mawman j 

 R.H. Evans; J. Hatchard; W. Anderson; S. Bagster ; J. Murray; 

 Baldwin, Cradock, and Joy ; Gale and Fenner ; E. Bentley ; Ogle and 

 Co. ; W. Ginger j Rodwell and Martin ; P. Wright ; J. Deighton and 

 Son, Cambridge j CoQstablc aad Co, JEdinburgh \ and Wflson and Son, 

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