Vol. 2. 



Published the First Day of every Month. — Price 2s. 6d. 



THE 



PHILOSOPHICAL MAGAZINE 



AND 



ANNALS OF PHILOSOPHY; 



COMPREHENDING 



THE VARIOUS BRANCHES OF SCIENCE, THE LIBERAL 



AND FINE ARTS, AGRICULTURE, MANUFACTURES, 



AND COMMERCE. 





NEW SERIES. 

 No?.— JULY 1827. 



^ITH A PLATE, 



Illustrative of Mr. Davies's communication on the Symmetrical Properties of 



Plane Triansles. 



RICHARD TAYLOR, F.S.A. F.L.S. M. Astr. S. &c. 



AND 



RICHARD PHILLIPS, F.R.S. L. &E. F.L.S. &c. 



AbtRB a FI.AMMAM 



loulron : 



PUINTBD DY AND FOR RICHAnD TAYLOR, RED LION COURT, FLEET-STREET: 



And sold by Baldwin, Cradock, and Joy ; Longman, Roes, Orine, Brown, and 

 Green; Cadcll; Sherwood, Gilbert, and Piper; Sinipkin and MiU-shali; 

 Underwood; W. Phillips ; Harding; Hichley: — and by Adam Black, Edin- j 

 burgh ; Smith and Son, Glasgow : and Hodges and M' Arthur, Dublin. 



