TABLE OF ALTITUDES. 

 List of Altitudes of the line from Columbia Barracks to Fort Okinakanc. 



613 



ERRATA. 



In table of latitudes and longitudes, page 456, for latitude of Fort Colville, 46 36 16&quot;, read 48 36 16&quot;. 



In table on page 568, for mean difference of readings of wet and dry thermometers, August, 1854, for 15.7, read 16 .7. 



