208 Ocean Magnetic Observations, 1905-16 



XIX. Chronometers and watches. (1) Marine chronometers 254 by A. Kittel (from 

 September 1912), 268 by A. Kittel (from September 1912), 1809 by T. S. and J. D. Negus, 

 loaned by W. J. Peters, 2761 by G. E. Wilkins, 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) pocket chronometers 256 by A. Kittel from March 1911, 

 258 by A. Kittel until December 1910, 260 by A. Kittel until September 11, 1911, 13733 by 

 Paul D. Nardin, for shore work ; (3) watches 51 by the Hamilton Watch Company, 90 by 

 the Waltham Watch Company until October 1912, 91 (sidereal) by the Waltham Watch 

 Company, 92 (sidereal) by the Waltham Watch Company from February 1913, 101 by the 

 Elgm National Watch Company from September 1912, 813 by the Howard Watch Works 

 from September 1912; unnumbered stop-watch. 



XX. Dip-of-horizon measurer. Dip-of-horizon measurer 4048, model A, by Carl Zeiss. 



Meteorological Instruments and Miscellaneous Equipment. 



XXI. Meteorological instruments. Same as for Cruise I with the addition of the follow- 

 ing: (1) Marine mercury-bai'ometer 4177, English scale, provided with attached thermom- 

 eter 11441, and ghnbal attachment, by H. J. Green, from March 1911; (2) boiUng-point 

 apparatuses, 6 from October 1911, and 8 and 9 from February 1912, all by the Department 

 of Terrestrial Magnetism; (3) Marvin sUng psy chrome ters' 534, 537 (broken September 

 1910), 550 from October 1911, 556 from October 1911, 560 from October 1911, and 4 

 thermometers, centigrade scale, 1, 2, 9, and 15, all by Schneider Brothers, to replace 

 broken psychi-ometer-thermometers, from June 1912; (4) thermograph 46034, by Richard 

 Freres, to June 1912, and after repairs from September 1912; (5) six-inch thermometer,^ 

 Bureau of Standards number 6722, by H. J. Green, from May 1913; (6) boihng-point 

 thennometers for work at sea,^ Bureau of Standards numbers 6192 from February 1911, 

 6329 from February 1912, 6330 from June 1912, 6331 from March 1911, 6332 from March 

 1911, 7827 from June 1912, 7828 from June 1912, 8116 from September 1912, 8117 from 

 September 1912, 8118 from September 1912, 8119 from September 1912, 8728 from Septem- 

 ber 1913, and 8729 from September 1913. 



XXII. Miscellaneous equipment. Same as for Cruise I, with the addition of the fol- 

 lowing: (1) Electric flashlights; (2) experimental prism-holders 1 and 2 and prisms, by the 

 Department of Terrestrial Magnetism. 



CRUISE III. JUNE TO OCTOBER 1914. 

 Magnetic Instruments. 



XXIII. For magnetic declination at sea. (1) Marine collimating-compass 1,* same as 

 for Cruise II; (2) deflector 4,* same as for Cruise II. The designations adopted, respec- 

 tively, for the 2 compasses with appurtenances are CI and D4. (3) Ritchie Uquid com- 

 pass 29971, same as for Cruise II; (4) Ritchie liquid compass 29499, and (5) Ritchie Uquid 

 compass 29497, same as for Cruise II; (6) Ritchie Uquid compass 39670, same as for 

 Cruise II; (7) Kelvin azunuth instrument 3619 for experunental use. 



XXIV. For magnetic inclination and total intensity at sea. (1) Sea dip-circle 189," 

 same as for Cruise II, with dip needles 5, 6, and 9, and intensity-needle pau-s 3 and 4, and 



'Psychrometer 205 was broken in December 1910. 



'Thermometer 4157 was on board until May 1913 only. , ^, , „ 



'The following thermometers were broken during the cruise: .3549, 3551, 6192, 6329, 6331, 7827, 8116, 8117, and 8118. 



'CoUimating compass 1 was overhauled and repaired, and improvements were made to the compass housmg and bmnacle 

 stand during April to May, 1914, in the instrument shop of the Department of Terrestrial Magnetism. 



'Deflector 4 was overhauled and repaired, and minor improvements were made during April to May 1914, m the instru- 

 ment shop of the Department of Terrestrial Magnetism, jjjj. .1. 



«Sea dip-cirole 189 was overhauled and repaired and reading microscopes with larger fields were added durmg .\pril to 

 May 1914, in the instrument shop of the Department of Terrestrial Magnetism. 



