248 A Bibliography of the Geology, etc., of California. 



inch) , equal to 60.8 inches to a nautical mile, and 52.8 inches 

 to a statute mile. A nautical mile is a minute of an average 

 great circle of the earth, and its length is 6,080 feet, or 1853.2 

 metres. A statute mile is 5,280 feet, or 1609.3 metres. 1 

 metre equals 39.37 inches; 1 centimetre equals 0.3937 of an 

 inch; 1 inch equals 2.54 centimetres. 



Scale. 



Statute 



1,200 52.800 



2,400 26.400 



4,800 13.200 



5,000 12,G72 



10,000 6.336 



15,000 4.224 



20,000 3.168 



30,000 2.112 



40,000 1.584 



50,000 1.267 



60,000 1.056 



80,000 0.792 



100,000 0.634 



200,000 0.317 



400,000 0.158 



1,000,000 0.063 



1,200,000 0.053 



Mile, 

 uches 

 nches 

 nches 

 nches 

 nches 

 nches 

 nches 

 nches 

 nches 

 nches 

 nches 

 nches 

 nches 

 uches 

 nches 

 nches 

 nches 



Anacapa Island, and east end of Santa Cruz Island, Califor- 

 nia. Preliminary survey. Topography by W. M. John- 

 son. Hydrography by the party under Lieut. Comdg. J. 

 Alden, U. S. N. 1856. Scale, 1 : 30,000. 



Same. 1879 ; corr. to 1884. 



Anacapa Island. Sketch by Lieut. T. H. Stevens, U. S. N. 

 1854. No scale. 



Blunt 's Reef. See Cape Mendocino. 



Bodega Bay, California. 1862. Scale, 1 : 30,000. 



Same. 1864. (More complete topography.) 



Same. Corr. to 1884. 



Cape Mendocino and Blunt 's Reef, California. 1877. C. 

 P. Patterson, superintendent. Triangulation and topog- 

 raphy by A. F. Rodgers, 1869-71. Hydrography, by 

 C. Bradford, 1872. Scale, 1 : 40,000. 



