(N.lV.Sidc) is any activity shown, Thorc are a number of gullies lead- 

 ing from the top of the new land to the lake and the old. land as if 

 there had been a great rush of water: one place resembled a 4 foot 

 road made by road scraper, perfectly smooth from top to bottom. 



"To the navigating officer of this vessel, Liouto;iant Vfacscho, is 

 duo tho credit for the survey and photographic work, preparation of the 

 sketch and collecting tho spGCimcns," 



Report of Captain Quinan, Comracuding U.S. Coast Guard Cutter 

 Tahoma, September 14, 1910, 



"Bogoslof Island is somewhat oval in shape and is about 1-g- 

 statute miles long and three-quarters of a mile wide in its widest 

 part, T/ith its major axis lying in a north-west and south-east direction, 

 magnetic, 



"Its shore lino is comparatively regular except at the north end, 

 where there ia a largo arch rock which at a distarjce appears detached 

 from tho main land but really connects with it by a low rocky neck. It , ^ 

 has three distinct elevations; Fire lisland, at the northerly end, 175 V 

 foot high; Castle Rock, at the southerly end, 289 feet high, midway 

 between them. No particular difficulties presented themselves in com- 

 puting the heights of Fire Island and Castle Rock, except the time 

 necessary for setting up insti-umcnts and taking angles, and measuring 

 base lines. With Perry Peak, however, the conditions were bad,' as tho 

 base and portions of the peak were enveloped in vapor and steam and the 

 lagoon 7iras steaming. The height was finally computed and is approxi- 

 mately correct, as the top of Perry Peak when viewod from tho ship was 

 seen to be almost on a level with the top of Fiie Island, 



"Fire Island (175 feet high) apparently has not changed since the 

 observations made by thj Revenue Gutter PERRY in June, 1910, but tho 

 top and the side of Castle Rock (289 foot high) appear to be split off 

 by earthquake offocts of tho recent eruption, 



"The now land in the center has entirely changed its formation ( 

 since the last observations were made. At that time it vras in the 

 form of a long sloping plateau; now the middle of this plateau has been 

 dished out, forming two peaks, the higher one being towards Fire Island, 

 The lower one, which is about 100 feet high, I have named Tahoma Peak 

 for designation. At the same time a high embankment has been throvm 

 up from the lagoon botwoen Fire Island and tho now Icaad, dividing the 

 lagoon in two parts, and making a uniform slope fram the top of the 

 high peak to tlic edge of the lagoon, and thus giving the only means 

 of accessr.to tho now land, 



"Tlie lagoon is much narrower than shown on the sketch of Bogoslof 

 made three years ago. On account of the high land, which has recently 

 formed between the logoon and shore line, it was impracticable to got 

 the boat over into the lagoon to take soundings, 



"The new land between Fire Island and Perry Peak is soft-sun-dried 

 and cracked towards Fire Island, and soft and steaming near tho lagoon, 

 Tho center of volcanic activity is at the base of the new land toward 



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