133 
our own western mountains there is a summer 
season, and luxuriant vegetation follows closely upon each re- 
treating snowdrift. In Colombia the temperature is practically 
you are above the line ot freeing, snow foreve 
I reached snow upon a a” or spur, and my guide took me 
to a point from which across an alpine valley almost devoid of 
vegetation we should have seen the main dome of the mountain 
‘e waited long, hoping the driving mist would break; at last it 
did so, but only partially and for a moment. It is now one 
my main regrets that I did not rise early enough to reach this 
i 
precipices and -pinnacles, the lower edge of the glacier which, 
as a solid cap of ice, covers the summit of Ruiz. 
After auciae from Libano to San Lorenzo I proceeded to 
g ; e 
obtained since leaving Bogot4 are my Collection III, numbers 
2690 to 3964, and were sent, January 22, 1918, on to Barranquilla, 
to await my later arrival at that port. 
IV. Tue Rio SINU AND THE CORDILLERA OCCIDENTAL 
In aecord with instructions sent me from New York I was to 
proceed to the forests of the Rio Sinu. This river drains a 
