34 S. P. Langley— Observations.on Mount Etna. 
residence, I was advised at Catania to make my stay at 
Nicolosi, the highest village on the mountain, and whose eleva- 
tion is a little over 2000 feet. It seemed, however, that a higher 
above Nicolosi, a cistern containing excellent water, near which 
is a hut built of lava, known as “Cas osco.” It is 
scarcely the “ house” its title denotes it to be, but it has walls, 
a roof, and even a kind of fire-place, while the chestnut planta- 
tion in the vicinity makes it possible to obtain fuel. 
had no hesitation in choosing this, then, and though the 
quarters were certainly not as comfortable as those I had left 
at Catania, I found them sufficient. The hut stands at an ele- 
