While I was raising blisters and frightening oxen and flamingoes, Mr. Tucker triangulated the Parinacochas Basin, making the first accurate map of this vicinity.

For exact measurements we depended on Topographer Hendriksen, who was due to triangulate Coropuna in the course of his survey along the 73d meridian.

The remainder of the day I devoted to sketching and triangulating the country, while the horses were enjoying the benefit of the fine feed.

Taking the whole series of them, Mr. Lowell very justly compares them to "a network which triangulates the surface of the planet like a geodetic survey, into polygons of all shapes and sizes.