52 



banks of batteries charged. The Delco was run, therefore, only 

 intermittently. The most frequent mechanical troubles were with the 

 oceanographic apparatus and the most serious of these difficulties 

 have already been described. 



The Marion cruised a total distance of 8,100 sea miles, or farther 

 than from New York to Sydney, Australia. The motors expended 

 14.000 gallons of oil, the rate of consumption being 1.5 gallons per 

 mile on one motor at an average speed of 6 knots and 2.3 gallons per 

 mile Avith tAvo motors at 8.7 knots. The survey covered that 450,000 

 square sea-mile area of ocean lying between Greenland and North 

 America which is situated between St. John's and the seventieth par- 

 allel of north latitude. A total of 191 stations were taken, at Avhich 

 about 2,000 observations of temperature and salinity Avere made. All 

 of the tests of salinity Avere made immediately on board by means 

 of electric salinometers. The fathometer registered 1,700 depths for 

 chart record and several times that number in actual practice. 



The data the Marlon had obtained during the course of her special 

 duties Avere noAv ready for scientific analysis. Although her northern 

 adventures were all over, the tale of them recorded in part in the 

 foregoing pages will live long in the memories of her complement, 

 whatever may be their future duties and Avherever they may go. 



