ARTICLE XXXIIL— MAGNETIC OBSERVATIONS MADE DURING THE 

 EXPEDITION TO THE SUBANTARCTIC ISLANDS OE NEW ZEALAND. 



By H. F. Skey, B.Sc, Magnetic Observatory, Christchurch, and C. Coleridge Fare, D.Sc, 



Canterbury College. 



The magnetic observers accompanying the expedition were enabled to make a 

 series of observations at thirteen stations on the islands visited, distributed as 

 follows : Stewart Island, one station ; Snares, one station ; Auckland Islands, 

 eight stations ; and Campbell Island, three stations. 



With the exception of two stations, the observations were complete, and included 

 observations of magnetic declination, magnetic horizontal force, and magnetic 

 inclination or dip. At Station B, Campbell Island, and at Enderby Island, the 

 prevalence of cloud prevented observation of the sun, and no declinations were 

 observed. The magnetic bearings of permanent marks were, however, observed at 

 these stations, and a future occasion may make these valuable. 



The observations at Stations I to V, Auckland Island, were made by Dr. C. C. 

 Farr and Mr. H. D. Cook, M.Sc, of Canterbury College. The observations at Camp- 

 bell Island were made by Mr. H. F. Skey, B.Sc, of the Christchurch Magnetic 

 Observatory, and Mr. E. Kidson, M.Sc, of Canterbury College, with the very willing 

 assistance of Mr. C. A'C. Opie. At the other stations the two parties combined to 

 make the observations in the shortest possible time. 



The instruments used were a magnetometer (No. 1) by the Cambridge Scientific 

 Instrument Company, and dip circle (147) by the same makers. These belonged to 

 the Observatory. A second magnetometer, by Jones (also Kew pattern), and a dip 

 circle were on loan to the Observatory by the committee of the British National 

 Physical Laboratory. For observations of time and latitude a 10 in. reflecting- 

 circle by Troughton and Sims was used — a very efficient and accurate instrument. 

 On Campbell Island time-observations were made by an excellent 5 in. transit 

 theodolite belonging to the Survey Department, which was also used to throw 

 bearings from station to station. 



All but two of the stations were permanently marked by a brass pipe 1 J in. 

 internal diameter and 18 in. long, with foot-plate 6 in. square ; and at most of them 

 an iron pipe of similar dimensions was placed at a sufficient distance to serve as a 

 permanent referring -mark of known bearing for future use. On Mount Honey, 

 Campbell Island, an iron pipe was also placed, and the bearings from it of various 

 landmarks and the two magnetic stations A and C definitely determined. 



Both the Auckland Islands and Campbell Island were found extremely difficult 

 to travel over, the former on account of the dense growth and the mountainous 

 character of the country, and the latter on account of the soft peaty surface. This 

 accounts for the observations being made on the sea-coast, with the exception of one 



