This Day is Published^ 



A LETTER to Dr. DAVID BOSWELL REID, Experimental As- 

 sistant to Dr. Hope, &:c. ; in answer to his Pamphlet entitled 

 " An Exposure of the Misrepresentations in the Philosophical Magazine 

 and Annals/' &c. 



By RICHARD PHILLIPS, F.R.S. L.& E., &c. 

 Samuel Highley, 174 Fleet Street. Price Is. 



Just Published, in quarto, Price Thirty Shillings, 



Illustrated by Nine Engravings; viz. Four large folding Plates of the Survey of 

 the Thames, and the Instruments employed ; One Quarto and Two folding Plates 

 of the Graphical Registrer of the Tides and Wind ; and Two Quarto Plates of 

 Magnetic Apparatus, and Illustrations of the paper on Negative Quantities ; 



THE PHILOSOPHICAL TRANSACTIONS OF THE ROYAL 

 SOCIETY of LONDON, 1831, Part I. 

 Contents: — Capt. Robertsons Observations on the Comet of 1822. 

 — Prof. Barjlovv on Fluid Refracting Telescopes.— Mr. Lubbock's Re- 

 searches in Physical Astronomy. — Mr. W. Snow Harris on the Trans- 

 ient Magnetic State of different Substances.^Mr. Da vies Gilbert on 

 Negative and Imaginary Quantities. — Prof. Barlow on the Phaenoraena 

 of Terrestrial Magnetism. — Mr. Ivory on the Equilibrium of Fluids, and 

 the Figure of a Homogeneous Planet. — Prof. Davy on an Electro-Che- 

 mical Method of Detecting Metallic Poisons. — Mr. Barry on Atmo- 

 spheric Electricity. — Mr. Lloyd's Survey of the River Thames, from Lon- 

 don Bridge to the Sea. — Mr. Fox on the Variable Intensity of Terrestrial 

 Magnetism. — Mr. Palmer on a Graphical Registrer of the Tides and 

 Wind. — Prof. Barlow on the Errors in the Course of Vessels from Lo- 

 cal Attraction. — Mr. Lubbock on the Meteorological Observations made 

 at the Royal Society. — The Meteorological Journal of the Royal Society, 

 from June to December 1830. 



THE POLYTECHNIC LIBRARY. 



THE design of tlie Publishers of the " POLYTECHNIC LIBRARY" 

 is to produce a series of highly instructive Works, which the pub- 

 lic may be tempted to dui/, because they will be cheap, — be induced to 

 read, because they will be brief, — be competent to understand, because 

 they will be clearly written, — and be able to profit by, because they will 

 be Works of Practical Utility. Every Volume, therefore, will 

 contain a complete Treatise, relating to one of the useful Arts or Sci- 

 ences, or the Chemical or Mechanical Trades. 



This day is Published, Vol. I. of the "POLYTECHNIC LIBRARY," 

 neatly printed iti 18mo, and illustrated by numerous Engravings, price 

 Two Shillings, bound in Cloth, containing 



The ART OF GLASS-BLOWING ; or Plain Instructions for making 

 the Chemical and Philosophical Instruments, which are formed of 

 Glass, such as Barometers, Thermometers, Hydrometers, Tube Vessels, 

 and Toys for Chemical Experiments and Recreative Philosophy. By a 

 French Artist. 



Printed for Bumpus and Griffin, 3 Skinner Street, London; Richard 

 Griffin & Co., Glasgow, and Stiilics, Brothers, Edinburgh :— By whom 

 will shortly be Published Vol. II. of tiiePoLYTECHNicLiBRARY, containing 

 the DOMESTIC CHEMIST; or Instructions for the Detection of Adul- 

 terations in Food ; and Vol. III. containing the PERFUMER'S ORA- 

 CLE; or Art of Preparing Perfumes and Cosmetics. 



