Instrumental Outfit for the Carnegie Work 211 



Terreetrial Magnetism; (5) radioactive content apparatus 4, provided with gimbal rings 

 and mounting, water-dropping apparatus, direct-current motor, ionizing chamber, anemom- 

 eter, and other appurtenances, designed and constructed for the most part by the Depart- 

 ment of Terrestrial Magnetism. The designations adopted, respectively, for the 5 instru- 

 ments are CA3, ICl, PRAl, PGA2, RCA4. (6) Accessories: Gerdien condenser, until 

 April 1915; fiber electroscopes 12, 14, and 15, all constructed by the Department of 

 Terrestrial Magnetism; Braun electroscope 1437; Wulf electroscopes 3537, 3995, and 

 4357, all by Giinther and Tegetmeyer; Wiechert electroscope 2 by Spindler and Hoyer; 

 high-resistance rheostats 1716 and 1751, from April 1916; batteries of cadmium cells and 

 Eveready dry cells; Zamboni dry-piles 1449, until June 1915, and 3376, both by Giinther 

 and Tegetmeyer; voltmeters; volt-anmieter; potentiometer; gimbal stand; non-magnetic 

 Gauss table ; radium and ionium collectors ; miscellaneous equipment, including non-mag- 

 netic clamps, special insulators, small tools, etc. 



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



XL. Sextants. Same as for Cruise III with the addition of sextant L809 by John Bliss. 



XLI. Chronometers and watches. (1) Marine chronometers same as for Cruise III, 

 with the exception of Kittel 254 and 268; (2) watches 70 and 71 by the Hamilton Watch 

 Company, 92 (sidereal) by the Waltham Watch Company, 106, 110, 116, and 117, all by 

 the Elgin National Watch Company. 



XLII. Dip-of-horizon measurers. (1) Dip-of-horizon measurer 4048 by Carl Zeiss; 

 (2) micrometer dip-of-horizon measurer 4031 by Carl Zeiss, loaned by the United States 

 Coast and Geodetic Survey until July 1915, designated as No. 1 of that survey; (3) dip- 

 of-horizon measurer 5490 by Carl Zeiss. 



Meteorological Instruments and Miscellaneous Equipment. 



XLIII. Meteorological instruments. Same as for Cruise III,' with the exception of 

 boiling-point apparatuses 3, 4, and 6, and thermometer Bureau of Standards number 4146, 

 and with the addition of the following: (1) Boiling-point thermometers for work at sea. 

 Bureau of Standards numbers 7828, 8119, and 8731; (2) special reading telescope and 

 mounting for boiling-point work at sea, designed and constructed by the Department of 

 Terrestrial Magnetism. 



XLIV. Miscellaneous equipment. Same as for Cruise III, with the addition of the 

 following: (1) experimental apparatus 1 for the determination of ship's motion, designed 

 and constructed by the Department of Terrestrial Magnetism ; (2) motion-picture camera 

 and appurtenances. 



GENERAL PROPERTY AND SUPPLIES. 



Besides the instrumental equipment hsted on pages 203-211, the general property 

 and supplies on board the Carnegie, 1909-1916, in addition to what were necessary for the 

 maintenance of the ship, were about as follows: 



I. Navigation charts, maps, and atlases of various kinds. 



II. Library of books on astronomy, navigation, magnetism (general and terrestrial), general 

 physics, atmospheric electricity, general chemistry, meteorology, geography, geology, 

 biology, sailing ship (sails and sail-making, etc.), encyclopedias, dictionaries, and general 

 literatm-e. The total nmnber of books in the Ubrary is about 1,200, of which 1,000 relate 

 to scientific and professional subjects. The library contains a complete set of the publica- 

 tions of the Carnegie Institution of Washington. 

 III. Medical books and miscellaneous suppUea. 



'Metric scales and verniers were added to the mercurial barometers 3948 and 4177 in February 1915. 



