...But few had explored the mighty remains of its past glory, or made their way either to the summits or into the interiors of its mountain-like edifices... 
W.H.G. Kingston 「Great African Travellers」
...To the north of it is a very much larger lake called Moero, surrounded by lofty mountains, clothed to their summits with the rich vegetation of the tropics...
W.H.G. Kingston 「Great African Travellers」
...Here thecountry begins to rise into hills, and I could see the summits ofhigh mountains to the westward...
Mungo Park 「Travels in the Interior of Africa, Vol. 2 [of 2]」
...Theynest abundantly near the summits of the ranges in Colorado, making theirnests among the rocks, and generally lining them with a few grasses...
Chester A. Reed 「The Bird Book」
...They lay their small eggsupon or near a species of sedge which is abundant on thesealpine summits...
Clarence M. Weed 「Butterflies Worth Knowing」
...Convex: the outer curved surface of a segment of asphere; opposed to concave: convex veins are those which occupythe summits of ridges on the upper surface of - wing; see concaveveins...
John. B. Smith 「Explanation of Terms Used in Entomology」
...The small ants endeavour with their burdens to climb to the summits of blades of grass; those who succeed are in safety with the eggs that they carry, for the Amazons do not climb...
Frédéric Houssay 「The Industries of Animals」
...These hillocks are selected by the spiders — apparently because they afford excellent drainage, and cannot be washed away by the winter rains — and their stony summits are often full of spiders’ nests...
Frédéric Houssay 「The Industries of Animals」
...The summits of these mounds, which are nearly flat, are some 13 feetabove this level...
Cosmos Mindeleff 「Casa Grande Ruin」
...Although opening toward the north, its position so farbelow the summits of the surrounding hills protects it from winterwinds...
Gerard Fowke 「Archeological Investigations」
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