Instrumental Outfit for the Carnegie Work 209 



7 and 8; (2) sea dip-circle 204, same as for Cruise II; (3) marine earth-inductor 3,' same 

 as for Cruise II, with the addition of moving-coil marine galvanometer 20698. The desig- 

 nations adopted, respectively, for the 3 instruments with their appurtenances are 189.56975 

 204.1275, and EI3. For the dip circles the intensity-needle numbers are italicized; for 

 cases when both deflection and loaded-dip observations were made the designation for the 

 intensity needles is followed by a dagger (f), thus, 189.567St- 



XXV. For horizontal intensity at sea. (!) Sea deflector 4, same as for Cruise II. The 

 designation adopted for the deflector and compass is D4. 



XXVI. For magnetic declination and horizontal intensity on land. (1) Theodolite 

 magnetometer 5, provided with tripod 5, by the Bausch and Lomb Optical Company 

 according to specifications of the Department of Terrestrial Magnetism ; (2) magnetometer- 

 inductor 25, provided with galvanometer and tripods, designed and constructed by the 

 Department of Terrestrial Magnetism. The designations adopted, respectively, for the two 

 magnetometers are 5 and 25. 



XXVII. For magnetic inclination on land. (1) Magnetometer-inductor 25, provided 

 with galvanometer, and tripod 25, designed and constructed by the Department of Terres- 

 trial Magnetism. The designation adopted for the instrument is 25. (2) Marine earth- 

 inductor 3 was also used for shore observations. 



Atmospheric-Electric Instruments. 



XXVIII. Instruments for observations in atmospheric electricity. (1) Conductivity 

 apparatus 2, same as for Cruise II; (2) Gerdien condenser by Spindler and Hoyer; (3) 

 electroscope 2, same as for Cruise II; (4) electroscope 3995, provided with appurtenances, 

 Wulf's design, by Giinther and Tegetmeyer; (5) ion counter, provided with Zamboni dry- 

 pile and accessories, after Ebert's design; (6) potential-gradient apparatus; (7) Braun elec- 

 troscope 1437, same as for Cruise II ; (8) three radium collectors and two ionium collectors, 

 same as for Cruise II; (9) Zamboni dry-piles 1449, 3206, 3230, and 3376; (10) volt-ammeter; 

 (11) potentiometer; (12) non-magnetic brass Gauss stand, same as for Cruise II; (13) 

 small non-magnetic gimbal-stand, same as for Cruise II; (14) Weston voltmeter 11763; 

 (15) two batteries of cadmium cells, Kruger's design, by Spindler and Hoyer; (16) mis- 

 cellaneous equipment same as for Cruise II, with small additions, including a Simpson 

 charging rod. 



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



XXIX. Sextants. Same as for Cruise II. 



XXX. Chronometers and tvatches. (1) Marine chronometers 254 by A. Kittel, 264 by 

 A. Kittel, 360 by Finer, 1044 by RoskeU, 2761 by G. E. WUkins, 52917 by E. Dent and 

 Company, 53151 by E. Dent and Company, 53157 by E. Dent and Company, 53862 by 

 E. Dent and Company, with ship and gimbal cases; (2) watches 51 by the Hamilton Watch 

 Company, 101, 114, 115, and 117 by the Elgin National Watch Company, 813 by the 

 Howard Watch Works; unnumbered stop-watch. 



XXXI. Dip-of-horizon measurer. Dip-of -horizon measurer 4048, same as for Cruise II. 



Meteorological Instruments and Miscellaneous Equipment. 



XXXII. Meteorological instruments. Same as for Cruise II, except thermometers 

 1252 and 1253, with the addition of the following: (1) six-inch thermometers, Bureau of 

 Standards numbers 9517, 9520, 9521, 9530, 9531, and 9532, by H. J. Green. 



XXXIII. Miscellaneous equipment. Same as for Cruise II. 



'Marine earth-inductor 3 was thoroughly overhauled and repaired during April 1914 in the inetrument shop of the 

 Department of Terrestrial Magnetism, 



