BOSTON PUBLIC LIBRARY 



210 3 9999 05982 424 1 



Print /12 Graphic produced by John Turk, OSGS indicating concentrations of 

 hydrogen ion in enow for the year 1992 in selected locations in Colorado. 

 The information in the print indicates that hydrogen ion in the Colorado 

 snow pack for the sites monitored is highest in the area of the Mt . Zirkel 

 Wilderness. 



