"And we are making seven miles an hour," I concluded for him, as I sat with my eyes upon the distance meter.
"One estimates it thirty miles, because the internal heat, increasing at the rate of about one degree to each sixty to seventy feet depth, would be sufficient to fuse the most refractory substances at that distance beneath the surface.
Lewis and Clarke struck the main body of the river at the forks, about four hundred miles from its mouth.
From hence, the general course of the river for about seventy miles was nearly southeast; varying in breadth according to its bays and indentations, and navigable for vessels of three hundred tons.
At sunrise the next day, which was 8th November, the boat had made more than one hundred miles
. The log indicated a mean speed of between eight and nine miles
Later on they would come to the unbroken trail, where three miles
an hour would constitute good going.
Towards two o'clock in the morning, the burning light reappeared, not less intense, about five miles
to windward of the Abraham Lincoln.
Under the glasses the disc appeared at the distance of five miles
. What would an aeronaut, borne to this distance from the earth, distinguish on its surface?
This valle varies from five to ten miles
in breadth; it is bounded b step-formed terraces, which rise in most parts, one above th other, to the height of five hundred feet, and have on th opposite sides a remarkable correspondence.
"There are not many of your own sort, Miles
!" I laughed.
This vast region is situated between the fifteenth and tenth degrees of north latitude; that is to say, that, in order to approach it, the explorer must penetrate fifteen hundred miles
into the interior of Africa.
Then I carried the sack about a hundred yards across the grass and through the willows east of the house, to a shallow lake that was five mile
wide and full of rushes -- and ducks too, you might say, in the season.