30 Ocean Magnetic Observations, 1905-16 



XI. For magnetic inclination and total intensity at sea. — Sea dip-circle 35, loaned by the 

 United States Coast and Geodetic Survey, with dip needles 2 and 5 (5 being from circle 

 163), intensity needles^ 3 and 4, 8 of circle 163, and 4 of circle 169, provided with brass 

 gimbal-stand 169 for use on board ship and tripod 169 for use on shore; this dip circle with 

 its appurtenances was originally made by A. W. Dover, but prior to its assignment to the 

 Galilee early in 1906, it was extensively modified and improved in the instrument shop 

 of the United States Coast and Geodetic Survey (see pp. 21-23) . The designations adopted 

 for dip-circle 35 are: 35.2(5)34, 35.2(5)3(5), 35.2(5)3(4), etc. The numbers in parentheses 

 refer to needles not belonging to dip circle 35, and the italicized numbers refer to intensity 

 needles; for cases when both deflection and loaded-dip observations were made, the desig- 

 nation for the intensity needle is followed by a dagger (t), thus, 35.2(5)S(4)t. 



XII. For horizontal intensity at sea. — Sea deflector 1 same as for Cruise I. The desig- 

 nation adopted for the deflector and compass is the same as before, viz, Dl. 



XIII. For magnetic declination and horizontal intensity on land. — (1) Magnetometer 

 36,^ same as for Cruise I ; (2) magnetometer 30, complete, with tripod, deflection bar, and 

 appurtenances, by T. Cooke and Sons, loaned by the United States Coast and Geodetic 

 Survey, used at one station only. The designations adopted, respectively, for the magnet- 

 ometers are 36 and 30. (3) Theodolite 3578 with tripod, by C. L. Berger and Sons and 

 loaned by W. J. Peters, was used for auxiliary observations at shore stations. 



XIV. For magnetic inclination on land. — (1) Land dip-circle 171, provided with dip 

 needles 1 and 2, intensity needles 3 and 4, and tripod, all by A. W. Dover, was used until 

 May 1906; (2) land dip-circle 178, provided with dip needles 1, 2, 5, and 6, intensity-needle 

 pairs 3 and 4, and 7 and 8, compass attachment, and tripod by A. W. Dover, used throughout 

 the cruise. The designations adopted, respectively, for the two dip circles are 171.12, and 

 178.1256 (the intensity needles were not used). (3) Land dip-circle 4655 with dip needles 

 3 and 4 by Casella, loaned by the United States Coast and Geodetic Survey, was used at one 

 station only; the designation adopted for this dip circle is 4655.34. (4) Sea dip-circle 35 

 with compass attachment was also used for shore observations (a few shore observations 

 were made with needle 1, which was returned to the Office for repairs just before the 

 Galilee sailed). (5) Sea dip-circle 169 with its needles and compass attachment as for Cruise 

 I was also used for a few observations made prior to the sailing of the Galilee, after which 

 169 was returned to the maker for extensive alterations and remodeling in accordance 

 with the specifications of the Department of Terrestrial Magnetism. 



Sextants, Chronometers, and Watches. 



XV. Sextants.— {V) No. 2611 and 2617 by Ponthus and Therrode; (2) No. 3265 by 

 C. Plath; (3) unnumbered sextant by L. Weule. 



XVI. Chronometers and watches.— {I) Marine chronometers 264 by A. Kittel, 1809 

 by T. S. and J. D. Negus and loaned by W. J. Peters, 53157 by E. Dent and Company, 

 53862 by E. Dent and Company, with ship and gimbal cases; (2) pocket chronometer 

 244 by A. Kittel for shore use; (3) deck watch 54672 by E. Dent and Company. 



Meteorological Instruments and Miscellaneous Equipment. 



XVII. Meteorological instruments.— S&me as for Cruise I, Avith the addition of mini- 

 mum thermometer, Fahrenheit scale, 4948 by H. J. Green. 



XVIII. Miscellaneous equipment. — Same as for Ciniise I. 



'Needle 4 of 35 was broken on Feburary 16, 1906, and was replaced by needle 8 of lfi3; because of erratic results, 

 this latter needle was replaced by needle 4 of 169 on August 23, 1906, and used with needle 3 of 3.5 for the intensity oherva- 

 tions during the remainder of the cruise. 



'Magnetometer 36 was slightly damaged by the accident to the Galilee on August 24, 1906. 



