Instrumental Outfit for the Carnegie Work 207 



Company according to specifications of the Department of Terrestrial Magnetism, was 

 used at Cape Town during March 1911. The designations adopted, respectively, for the 

 five magnetometers are 2, 4, 14, 19, and 8. 



XVI. For magnetic inclination on land. (1) Land dip-circle 201, provided with dip 

 needles 1, 2, 5, and 6, intensity-needle pairs 3 and 4, and 7 and 8, compass attachment, and 

 tripod 201, all by A. W. Dover; (2) earth inductor 2, provided with tripod 2, galvanometer 

 206, tripod 206, and appurtenances, all by Otto Toepfer and Son, from September 1910; 

 (3) universal magnetometer 14, provided with tripod 14, Dover dip needles 1, 2, 5, and 6, 

 and intensity-needle pairs 3 and 4, and 7 and 8, designed and constructed by the Depart- 

 ment of Terrestrial Magnetism, from April to September 1913; (4) universal magnetometer 

 19, provided with tripod 19 and Dover dip needles 1, 2, 5, and 6, designed and constructed 

 by the Department of Terrestrial Magnetism, from September 1912 to May 1913; (5) 

 marine earth-inductor 3 was also used for shore observations; (6) land dip-circle 172, pro- 

 vided with dip needles 1, 2, 5, and 6, intensity-needle pair 3 and 4, and tripod 172, all by 

 A. W. Dover, was used at Cape Town diu-ing April 1911. The designations adopted, 

 respectively, for the six instruments are 201.125, EI2, 14.1256, 19.1256, EI3, and 172.1256 

 (the intensity needles and the extra dip needles were not used). 



Atmospheric-Electric Instruments. 



XVII. Instruments for observations in atmospheric electricity. (1) Batteries of cad- 

 mium cells, Kriiger's design, by Spindler and Hoyer, as follows: 2 throughout cruise, 2 

 from July 1910, and 2 from February 1912; (2) Harm's standard condenser 1693, by 

 Gunther and Tegetmeyer; (3) conductivity apparatus 2, complete with accessories, Ger- 

 dien's design, by Spindler and Hoyer; (4) dispersion apparatus, Elster and Geitel's design, 

 by Gunther and Tegetmeyer; (5) Zamboni dry-piles 1449 throughout cruise, 3206 and 3230 

 from February 1912, and 3376 from September 1912; (6) aluminum-leaf electroscope, by 

 Spindler and Hoyer; (7) electroscope 2, provided with appurtenances, Wiechert's design, 

 by Spindler and Hoyer, from February 1912; (8) bifilar electroscope 3537, provided with 

 appurtenances, Wulf's design, by Gunther and Tegetmeyer, from December 1912; (9) 2 

 ionium collectors by Gunther and Tegetmeyer, from February 1912; (10) 4 radium 

 collectors, by F. H. Glew, 2 throughout the cruise, and 2 from June 1911 ; (11) sea-and-rain- 

 water radioactivity-apparatus, by the Department of Terrestrial Magnetism, provided 

 with lamp, electroscope 1437, and appurtenances; (12) voltmeter, from October 1913; 

 (13) ammeter, from October 1913; (14) non-magnetic brass Gauss stand, constructed by 

 the Department of Terrestrial Magnetism; (15) small non-magnetic gmibal-stand, from 

 September 1912; (16) miscellaneous equipment, including non-magnetic brass-clamps, 

 special insulators, flame collectors and supports, non-magnetic brass laboratory-supports 

 and stands, ionization chamber 1, aluminum foil, small tools, Dewar flask, etc. 



Sextants, Chronometers, Watches, and Dip-of-Horizon Measurer. 



XVIII. Sextants. (1) Nos. 2575, 2611, 2617 (from September 1912), 2943, 2944, by 

 Ponthus and Therrode (the last two instruments are specially designed for use at night) ; 

 (2) No. 3265 by C. Plath; (3) Nos. 10756, 10759, and 22876 (from September 1912), all by 

 KeufTel and Esser Company; (4) unnumbered sextant by L. Weule; (5) gyroscopic colli- 

 mator and octant 2679 by Ponthus and Therrode; (6) pocket sextant 301' by James J. 

 Hicks; (7) extra small sextants 3380 and 3393 by Carey, Porter Ltd., from September 30, 

 1913; (8) unnumbered pocket-sextant by Troughton and Sumns, loaned by W. J. Peters; (9) 

 prismatic circle 11717 by Carl Bamberg. 



'Sextant 301 was overhauled and repaired in the instrument shop o£ the Department of Terrestrial Magnetism in April 

 1910; at that time several small parts found to be slightly magnetic were replaced by non-magnetic parts. 



