THE NORTHERN PACIFIC ROUTE. vi 
showers of rock fragments. Of these great conical masses, built up 
by successive lava flows and by the accumulation of rock fragments 
blown from the craters, the highest is Mount Rainier, towering 14,408 
feet above Puget Sound, from which it presents a magnificent spec- 
tacle, its upper slopes eovared by great streams of moving ice, the 
largest glaciers in the United States south of Alaska. 
On emerging from the Cascades the traveler enters a broad lowland, 
which is separated from the Pacific Ocean by the Olympic Mountains, 
but which contains Puget Sound with its many branching waterways, 
one of the most remarkable bodies of salt water on the globe. 
Nore.—For the convenience of the traveler the sheets of the route map in this 
bulletin are so arranged that he can unfold them one by one and keep each one in 
view while he is reading the text relating to it. A reference is made in the text to 
Kone sheet at the Paige where it should be so unfolded, and the areas covered by the 
n Plate I. A list, of these sheets and of other auctions, showing 
wwlaibe athe one is placed in the book, is given on pages 205-207. A glossary of 
geologic terms is given on pages 199-203 and an index of stations on pages 209-212, 
