CONTENTS. V 



JUNE, 1811. 



Enoravings of the following Subjects: 1. Methwl of coveriirg a Roof wU|^ 

 Flagstones by E. L. Edgevvorth, Esq. F. K. S. M. R. I. A. 2. A Ship's 

 ordinary Boats converted unto Lifeboats, by the Rev. J. Bremner. 3. A 

 Barometer with an adjusting Scale, and 4. An Airpump for producing a 

 perfect Vacuum, by a Correspondent. 5. Sections of a Grapehouse, by 

 T. A. Knight, Esq. F. R. L. and H. SS. 



I. Description of a Method of Roofing Buildings securely with Flagstones. By' 

 Richard Lovell Edgeworth, Esq. F. R. S. M. R. I. A. - 81 



II. Method of making any Ship's Boat a Lifeboat, to preserve the Lives of the 

 Crew in imminent danger; by the Rev. James Bremner, Minister of Walls 

 and Flota, Orkney Islands - » - - 86 



III. On the Scale of the Barometer, and the Construction of an Airpump for 

 procuring a perfect Vacuum. In a Letter from a Correspondent 105 



IV. A Description of a Forcing House for Grapes; with Observations on the 

 best Method of constructing them for other truits. By T. A. Knight, Esq. 

 F. R. S. &c. - ... . 100 



V. On some of Uie Combinations of Oximuriatic Gas and Oxigen, and on the 

 Chemical Relations of these Principles to Intiaminable Bodies. By Hum- 

 phrey Davy, Esq. LL. D. Sec. R. S. Prof. Chem. R. 1. F. R. S- E. 1 12 



VI. Farther Account of a Mulfe Animal between the Male Ass and Female Ze- 

 bra. In a Letter from Thomas Andrew^Knight, Esq. F. R. S. &c. 12T 



VII. Remarks on Potassium, Sodium, &c. ; in Reply to the Commvmications 

 of Justus. ByJohnDalton - - - ^ 129 



VIII. Table of the Rain that fell in various Places in the Year 1810, by the 

 Rev. J. Blanchard, of Nottingham; with a Meteorological Table for the 

 same Year, by Dr. Clarke, of that Town - - 134 



IX. On the Use of Iron Pipes for conveying Water, and Mode of securing 

 their Joints. In a Letter trom Mr. Joseph '['. Price - 136 



X. On the Invention of the Economical Process for Evaporation ascribed to 

 Montgolfier. In a Letter from Mr. St. Amaud - - 138 



XI. On the Combustion of Ether, and of Metals, in Oximuriatic Gas: by Mr. 

 Van Meerten, and Mr. Stratingh - - - 140 



Xn. Observations in Illustration of Mr. Howard's Theory of Rain. In a 

 Letter from ' 1 homas Forster, Esq. - _ ♦ - 142 



XITI. Observations on Dr. Bostock's Review of the Atomic Principles of Che- 

 mistry. ByJohnDalton - - - - 143 



Scientific News - - .■--. - 151 



Meteorological Journal - * - • HO 



JULY, 



