508 GENERAL SIR EDWARD SABINE ON TERRESTRIAL MAGNETISM. 
In the preceding Numbers of these Contributions the great assistance received for 
many years past from the Hydrographic Office of the Admiralty has been thankfully 
acknowledged. In tracing now the last lines of the present number, which completes 
the series, these acknowledgments must be expressed anew, and with redoubled 
earnestness ; for without the cordial and truly invaluable assistance of Captain Evans, 
and of Staff-Commander E. W. Creak of his Department, its preparation, under the 
weight of broken health and increasing weakness, would have been impossible. 
EREATA IN CONTRIBUTION No. XV. 
Page 464, line 19. Aji Barang, for Lat. 2° 25' S. read 7° 25' S. 
Page 475, line 2. Declination. At sea — Lat. 17° 15' S., Long. 292° 45' E. should be expunged. 
