▼i CONTENTS. 



MARCH, 1811. 



Engravings of the following Subjects: 1. Diagrams to illustrate the Motion of 

 Rockets, by W. Moore, Esq. 2. Dissections of the Petals of various IHowers, 

 showing the Structure from which the Beauty of their Colour arises, by Mts. 

 A. Ibbetson. 3. Parts of the Corollas of different Flowers delineated from Na- 

 ture, by the same Lady. 



I. On the Motion of Rockets both in Nonresisting and Resisting Me diums. 

 By VV. Moore, Esq. - - - - 161 



II. The beautiful Tint of Flowers acquired by the same Means that paint the 

 Rainbow. Iii a Letter from Mi-s. Agnes Ibbetson - 170 



III. An Analysis of a Soil containing free Muriatic Acid, and Muriates of 

 Soda, Lime, Alumine, Magnesia, and Manganese. By the Rev. William 

 Gregor. Communicated by the Author. - - 180 



IV. Observations on the Oxides of Iron, with a Discussion of their Nature ; 

 by Mr. J. H. Hassenfratz - - - 184 



V. Some Remarks on the Observations and Experiments of Mr. Mnrray, on the 

 Nature of Oximuriatic Acid, and its Relations to Muriatic Acid. Ry Mr. 

 John Davy - - - - - 193 



VI. An Estimate of the Height, Velocity, and Magnitude of the Meteor thai- 

 exploded over Weston, in Connecticut, December the 14th, 1807: with 

 Methods of calculating Observations made on such Bodies. By Nathaniel 

 Bowditch, A.M. A. A. S. and Member of the Philosophical Society held 

 at Philadelphia - - - - - 206 



VII. On Muriatic and Oximuratic Acid, in Reply to Mr. Dalton. In a Letter 

 from a Correspondent - - - - 219 



Vin. On Cvstic Oxide, a new Species of Urinary Calculus. By William Hyde 

 Wollaston', M. D. Sec. K. S. - - - 222 



IX. Comparative Analysis of Gum Resins: by Mr. Henry Braconnot, Professor 

 of Natural History, &c. - - - - 228 



Scientific News. ' - - - - - 238 



Meteorological Table - - - - 210 



APRIL, 



