A Monograph of Marcus Island. 89 



of the coast meander lines were taken with a compass and chain 

 and may be regarded as approximate!}' correct. Starting about 

 1 500 feet from the southwest point the readings would be as follows : 



1. NE. il> N.. Magnetif' fiSWU feet. 



•1. E. by S., Magnetic 600 feet. 



3. S. V4 E., Magnetic 6000 feet. 



4. S. by \V. i/o W., Magnetic 'JOO feet. 



.5. S W. by \V. 1/2, Magnetic 600 feet. 



6. \V. l)y S.. Magnetic :!00 feet. 



7. \V. by .v.. Magnetic 6000 feet. 



CoKRECTioNS.— Corrected bearing of line 3, % of a point to the 



east. Corrected unmeasured portion of line 1 by adding i. 500 ft. 



On all sides of the island, usually well up from the water, was 

 abundant driftwood and wreckage. Great logs of unknown origin, 

 sometimes fift}' feet in length, with broken branches and scarred 

 trunks were common. But it was well toward the north point that 

 a single great "Northwest" log had gone ashore and been driven 

 a considerable distance inland. Applying a tape I found the log 

 twelve and a half feet in length by forty-two inches in diameter. 

 Both ends had been cut square, and into the butt end was driven a 

 large wooden wedge. We regarded this bit of silent evidence as 

 indicating the natural relation existing between the American con- 

 tinent and this all but lo.st island, and looked upon it as a fore- 

 runner of the ultimate annexation of Marcus by the United States, 

 an event which since our visit has been full}^ recognized. To the 

 naturalists the .story of the voyage of this adventurous log, detail- 

 ing its hi-story from the time of its leaving its home at Puget Sound 

 until at last, wind and current-driven across the Pacific, it reached 

 its final resting place, high on this isolated spot, would indeed be 

 interesting and instructive could it be accurately told. 



GEOLOGY. 



From the description of the physical features which has been 

 given it may be gathered that the island is to be considered as an 

 ancient triangular atoll which has been elevated above the sea. 

 The chief reasons for so regarding it are, its proximity to regions 

 of known volcanic disturbances, its old dry lagoons, the elevated 

 table of coral rock exposed at the southern side as well as the more 

 recent one at the northern end, the steps or bench-like beaches on 

 the eastern side, the huge blocks of coral rocks scattered over the 

 surface which are above the reach of the highest seas, in addition 



