DEPARTMENT OF TERRESTRIAL MAGNETISM. 167 



fidently be expected that the results soon to be derived from this work, be- 

 sides furnishing navigators with more correct magnetic charts than hitherto 

 available, will assist materially in solving some of the vexed problems of the 

 distribution of the earth's magnetism. With the aid of the land work con- 

 ducted simultaneously with the ocean work by the Institution and other or- 

 ganizations, it will soon be possible to construct a new set of magnetic charts 

 for nearly one-third of the globe, as based almost exclusively on freshly ac- 

 quired and homogeneous magnetic data. 



There is also cause for gratification at the rare good fortune which has at- 

 tended the execution of the ocean work thus far. Throughout the period of 

 work (1905-8) the vessel, an all-sailing one with no auxiliary power, though 

 exposed at times to imminent danger, met with but one accident, viz, when 

 she was dashed by a typhoon against the breakwater at Yokohama, August, 

 1906, and was partially sunk in 14 feet of water. Ten days after this accident, 

 however, she again set sail for a lengthy cruise to San Diego, California. 

 Not a single loss of life in her personnel is to be recorded. 



The experience gained proved conclusively that for the most economical, 

 expeditious, and satisfactory execution of the ocean magnetic survey, it would 

 pay to suspend now the work, return the chartered vessel to her owners, and 

 undertake the construction of a vessel designed wholly with the special needs 

 in view. 



The authorization of the building of such a vessel by the Executive Com- 

 mittee of the Carnegie Institution of Washington should surely be a source of 

 encouragement and stimulus to every investigator in magnetic science. A 

 brief description of the proposed new vessel, to be called the Carnegie, in ac- 

 cordance with the action of the Executive Committee follows. Acknowledg- 

 ment should be made of the substantial and valuable assistance rendered by 

 Dr. Charles Lane Poor, of Columbia University, in the settlement of some 

 very important details in the plans of this vessel. 



THE NEW MAGNETIC SURVEY YACHT, THE "CARNEGIE." 



The principal dimensions of this vessel are to be: Length over all, 155 feet 

 6 inches; length on load water-line, 128 feet 4 inches; beam, molded, 33 feet; 

 depth of hold, 12 feet 9 inches, with a mean draught of 12 feet 7 inches, and 

 a displacement of 568 tons with all stores and equipment on board. All the 

 materials entering into the construction of the vessel are to be non-magnetic 

 and to be of the very best of their kind. 



The hull will be constructed of wood ; the keel, stem, sternpost, frames, and 

 deadwood to be of white oak, the beams and planking of yellow pine, and the 

 deck of Oregon pine. The fastenings are to be locust treenails, copper and 

 Tobin bronze bolts, and composition spikes. All deck-fittings and metal-work 

 on spars and rigging will be of bronze and copper, and the rigging will be of 

 hemp. 



