TABLE OF CONTENTS. 



NUMBER LXVII— JULY, 1818. 



Page 

 History of Physical Science from the Commencement of the Year 1817. 



Part I. By Thomas Thomson, M.D. F.R.S. &c. &c 1 



Biographical Sketch of Brisson 43 



On the Geography of Plants. By N. I. Winch, Esq 45 



Account of a Storm in Sussex in 1729 : 49 



On the Construction of Fire-places to Steam Boilers. By John and Phi- 

 lip Taylor, Civil Engineers bV 



Observations on the River Zaire 53 



Morphium and Meconic Acid 55 



On softening Steel by heating and quenching it, and on the hardening and 



tempering it at one Operation. By Thomas Gill, Esq 58 



History of Dr. Brewster's Kaleidoscope, with Remarks on its supposed 

 Resemblance to other Combinations of plain Mirrors. From a Corre- 

 spondent 59 



Proceedings of the Royal Society, May 28, June 4, and 11 67 



. , Geological Society, March 6, April 3, 17, May 1, 



and 15 69 



Linncean Society, May 5, 25, June 2, and 16 71 



Attempts to penetrate into the Interior of Africa 72 



On Pargasite 73 



On Mr. Tritton's distilling Apparatus ibid. 



Newly discovered Membrane in the Eye 74 



Plate presented to Dr. Paris ibid. 



On the Spiral Oar. By James Boaz, Esq 75 



Discovery of a new Metal : ibid. 



Col. Beaufoy's Astronomical, Milgnetical, and Meteorological Observa- 

 tions, for May 76 



Mr. Howard's Meteorological Journal, April 28 to May 26 79 



NUMBER LXVIII.— AUGUST. 



Biographical Sketch of C. A. Coulomb 81 



On the injurious Effect of burying Weeds. By Mrs. Ibbetson 87 



On the Fountainhall Chalybeate Spring. By T. L. Dick, Esq. F.R.S. E. QI 



Oh Triple Pruseiate of Potash. By Thomas Thomson, M.D. F.R.S. &c. 102 



( >n a Substance from Coal Tar. By J. Syme, Esq 112 



On Borax and Tartar. By M. Vogel 113 



On the Milk of the Cow Tree. By 1VL Humboldt 115 



On Magnetite). By M. Hatty 117 



On the Intestinal Gases of the Elephant. I5y M. Vauquclin 119 



