230 



Reports on Special Researches 



east of absolute house (probably nearly the same as "Peg 11" of 1906); "Brass pipe," 150 

 feet northeast of absolute house, and "Near brass pipe," somewhat east-southeast of "Brass 

 pipe." The Observatory standards were: Kew magnetometer No.l and Dover dip circle 

 No. 147, needles 1, 2, 3. For series I f 1906^ the comparisons in horizontal intensity are not 

 given because the observations by Observer Heimbrod with Tesdorj^f magnetometer No. 2025 

 (deflections only) were used for determination of the intensity-constant, as based on the 

 //-difference, (C. I. W. Christchurch) determined from series II. In series II the Christ- 

 church values, supplied by Director H. F. Skey, were scaled from the magnetograms the 

 base-Unes of which were determined with the Observatory absolute instruments (Kew mag- 

 netometer No. 1 and Dover dip circle No. 147). The C. I. W. values of horizontal intensity 

 for series II were each derived from 1 set of deflections combined with 2 sets of oscillations. 

 The comparisons 1907-08 were obtained at the time of the visit of the magnetic-survey 

 vessel Galilee to Port Lyttelton. 



Table SA. Results of Declinntion Comparisons at the Christchurch Observatory, 1006-1908. 

 (Magnetometers used by C. I. \V. observers: Testlorpf No. 2025 for series I and C. I. W. No. 4 for series II.) 



'There is no appreciable station-difference. 



'Simultaneous observations by Mr. Skey with Kew magnetometer No. 1, .station not designated, but probalily peg II. 



T.^BLE 8 B. Results of Horizoiital-Intcnsity Comparisons at the Christchurch Obscrvatonj, 1907-1908. 

 (Magnetometer used by C. I. ^\ . observer: C. I. W. No. 4.) 



'There is no apprecialilc station-difference. 



