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VII. Astronomical Observations made at Paramatta and 

 Sydney. By his Excellency Sir THOMAS BRISBANE, 

 K. C. B. F. R. S. Lond. & Edin., & M. RUMKER. 

 In a Letter to Dr BREWSTER, Sec. R. S. Edin., 112 



VIII. On a Remarkable Case of Magnetic Intensity of a 

 Chronometer. By GEORGE HARVEY, Esq. M. G. S. 

 M.A.S. &c. 117 



IX. Remarks concerning the Natural-Historical Deter- 

 mination of Diallage. By W. HAIDINGER, Esq. 127 

 X. Investigation of Formula, for finding the Logarithms 

 of Trigonometrical Quantities from one another. 

 By WILLIAM WALLACE, F.R.S. Edin., and Profes- 

 sor of Mathematics in the University of Edinburgh, 1 48 



XI. A proposed Improvement in the Solution of a Case in 

 Plane Trigonometry. By WILLIAM WALLACE, 

 F.R.S. Edin. and Professor of Mathematics in the 

 University of Edinburgh, 1 68 



XII. Some Notices concerning the Plants of various Parts 



of India, and concerning the Sanscrita Names of 

 those Regions. By FRANCIS HAMILTON, M.D. 

 F.R.S. & F. A. S. Lond. & Edin. 171 



XIII. On a New Species of Double Refraction, accompany- 



ing a remarkable Structure in the Mineral called 

 Analcime. By DAVID BREWSTER, LL.D. F. R. S. 

 Lond. & Sec. R. S. Edin. .187 



XIV. On the Specific Heat of the Gases. By W. T. HAY- 



CRAFT, Esq., 195 



XV. On the Forms of Crystallisation of the Mineral called 

 the Sulphato-tri-Carbonate of Lead. By W. HAI- 

 DINGER, Esq. F. R. S. E. 217 







