TO corresponde:nts. 



The Minerals of Haytor are described in terms so unintelligible, that 

 we must decline inserting the paper on them. 



♦^* The Editors request that all Communkaiions intendedjbr immediate 

 insertion may be sent to the care of Mr. Richard Taylor^ Printing Office, 

 Red Lion Court; Fleet Street, London, at Jtirthest by the 15th day of the 

 month, or they •will be too late to appear in the ensuing Number. 



NEW EXCISE REGULATION ACT. 

 Just Published, Price I*. 6d. 



AN ABSTRACT OF THE EXCISE GENERAL REGULATION 

 ACT. 7 and 8 GEO. IV. Cap. 53. Intituled " An Act to Conso- 

 lidate and Amend the Laws relating to the Collection and Management 

 of the Revenue of Excise throughout Great Britain and Ireland." To 

 commence on the .5th of January 1828. 



Printed Jrom an Abstract used by the Officers of Excise. With a co- 

 pious Index, 



London : Printed and sold by Richard Taylor, Red Lion Court, Fleet 

 Street; sold also by Simpkin and Marshall, Stationers' Court; and by 

 R. 6. Bate, Mathematical Instrument Maker to the Honourable Board 

 of Excise, 17, Poultry. 



This day is published, in one vol. I2mo., price is. 6d. bds.^ 



A COMPENDIUM of GAS LIGHTING, adapted for the Use of 

 those who are unacquainted with Chemistry, and containing an Ac- 

 count of some new Apparatus lately introduced. 



By WILLIAM MATTHEWS. 



Also, by the same, in one thick volume 1 2mo., price 7s. 6d. bds. 



AN HISTORICAL SKETCH of the Origin, Progress, and Present 



State of GAS LIGHTING. 



Sold by R. Hunter, 72, St. Paul's Churchyard. 



PHILOSOPHICAL INSTRUMENTS. 



A DESCRIPTIVE CATALOGUE of the OPTICAL, MATHE- 

 MATICAL, PHILOSOPHICAL and CHEMICAL INSTRU- 

 MENTS and APPARATUS, constructed and sold by Watkins and 

 Hill, may be had (price One Shilling,) at their old established Ware- 

 house, 5, Charing Cross, London. 



