vi CONTENTS. 



OCTOBER, 1812. 



Engravings of the following Subjects : 1 , Diagranas for explaining the ra- 

 diated figure of the stars and other luoilnous objects, 2 Figure to illustrate 

 the theory of Refraction. 3 An improved Circle of Reflection, by Mr. J. 

 Allan. 



I. On the Electric Column, and Aerial Electroscope. By J. A De Luc, Esq. 

 F. R. S. - - - - - - 81 



II. Effect of the Attraction between the weights and the pendulums on the 

 going of Clocks. In a letter from Mr. Thomas Reid. - 92 



III. An Essay on the apparent Figure of Stars and luminous Objects, seen 

 at a very great distance, and under a very small Diameter. Ey Mr. J. H, 

 Hassenfratz. - - - - . - g5 



IV. On the double Refraction of Light in transparent Crystals : By M. 

 Laplace. ----__- i04 



V. Description of a Reflecting Circle, in which the Screens can be readily 

 shifted in taking altitudes ; by Mr. J. Allan, Blewitt's Buildings, Fetter 

 Lane. - - - - - - -112 



VI. Meteorological Journal. - - - --118 



VII . An account of some Experiments on the Combinations of different 

 Metals and Chlorine, &c. By John Davy, Esq. communicated by Sir 

 Humphrey Davy, Kt. LL. D., Sec. R. S. - - - 1 20 



VIII. On the coral Fishery in the Sicilian Seas j by Alfio Ferrara, M.D. 136 



IX. On the medical Effects of the Bark of the Piscidia Erythryna of Lin- 

 naeus, or Jamaica Dogwood. In a letter from William Hamilton, Esq. 145 



X. A Correspondence between Dr. Bostock.and Dr. Marcet, on the subject 

 of the uncombined Alkali in the Animal fluids. - - 147 



XI. On the Culture and Preparation of Hemp in Dorcetshire, and on the 

 Growth of Sea Cale : By H. B. Way, Esq. - - - 151 



XII. On the perfumed Cherry, (Prunus-mahaleb :) by Mr, ToUard, 

 senior. _ _ _ . _ 158 



Xin. Notice from a Work of Monsieur Lelieur, on the hereditary 

 Diseases of Fruit Trees : by the Right Hon. Sir Joseph Banks, Bart. K. 

 B. P. R S. &c. - - - - - - 159 



Scientific News. - - - - - - ibid 



NOVEMBER, 



