vi CONTENTS. 



JULY, 1811. 



Enm-avings of the following; Subjects : 1 . Figures to illustrate the Formation of 

 the Leaves of P'irs, and their Fnicttfication, and the Motion of the Flower of 

 the Barberry ; delineated by Mr^. Agnes Ibbetson. 2. A Diagram, HKistratr 

 ing the Raciialion of Cold, by Marshall Hail, Escj. 



r. On the manufacturing of Thread, and Articles; reseinbKng Flax, Hemp, 

 Tow, and Cotton, from the Fribres of the common Nettle. By Mr. Edward 

 Smith, of Brentwood, Essex r r r • *• •» 161 



IT. Description of an improved Reapinghook for Corn. By Mr. Joseph Hutton, 

 Jun. of llidgway, near Sheffield - - - HI 



m. Report of Messrs. De Prony, Charles Montgolfier, and Carnot, to Xhe 



French Institute, on the Invention of a new Engine, by Mr. Cagniard- 

 . LatouF, formerly Pupil at the Polytechnic School - 175 



JV. Description of an Instrument for facilitating the Reductiori of Plans ; by 

 Mr. de la Chabeaussiere - r - - - • •• - - 179 



y. On Mortars and Cements ; Experiments that show the Cohesion which 

 Lime contracts with Mineral, Vegetable, or Animal Substances ; extracted 

 from a Paper read to the French Institute the 17th of October, 1808, by 

 B. G. Sage - - - - . ... . - 181 



VI. Observations on the Alkaline Metalloids ; by M. Bucholz r 183 



VII. Farther Observations and Ii^xperiments op Oximuriatie Acid, by J. Mur- 

 ray, Lecturer on Chemistry, Edinburgh , - - 187 



yill. Description of Firs, illustrated by Dissections. By Mrs. Agnes Ibbet- 

 son - - - - ■ - 203 



IX. On the MotioivoHJie Flower of the Barberry. In a Lettei* from Mrs. 

 Agnes Ibbetson tV^^ - . - - . ..- 213 



X. An improved Method of cultivating the Alpine Strawberry. By Thomas 

 Andrew Knight, Esq. F. R. ^., ^p. - - 214 



' XL: On, the JSlature of ,Heat. By Marshall Hall, Esq. In a Letter from the 

 .. Author - - 213 



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

 tiie Chemical Relations of these Principles to inflammable Bodies. By 

 Humphry Daw, Esq. LL. D. Sec. U.S. Prof. C hem. R. L F. K. S. E, 



222 



Scientific News. - . - - - - 2J« 



AUGUST, 



