Plates, from 'Observations on the diurnal changes in the position of the horizontal needle, under a reduced directive power, at Port Bowen, 1825' by Lieut Henry Foster Charts showing magnetic needle variation at Port Bowen [Queensland, Australia] from January-March 1825. Does not include text of paper. Subject: Magnetism / Navigation Published in Philosophical Transactions as 'Observations on the diurnal changes in the position of the horizontal needle, under a reduced directive power, at Port Bowen, 1825'. Communicated 12 January 1826. [1826]