Isthmuses are usually composed of adamantine rock or of shifting sands--the latter being much the more refractory material to deal with.
Nor is it likely that the Atlantic Ocean is divided into two seas by narrow isthmuses so placed as to prevent circumnavigation: how much more probable that it is confluent and uninterrupted!
These two isthmuses in the eastern and western hemispheres have some obvious features in common.
On Davis Strait a few important isthmuses must be mentioned.
The peninsulas between Padli Fjord and Exeter Sound, which have no ice foot, can be crossed by narrow isthmuses near the head of the bays.
One such contingency, though perhaps a remote one, was the possibility of a rival canal, for there are other isthmuses than that of Panama which might be pierced with the aid of modern resources of capital and genius.
In the first place it was agreed that any canal to be constructed over any of the isthmuses was to be absolutely neutral, in time of war as well as of peace.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "isthmuses" in a variety of sentences. We hope that you will now be able to make sentences using this word.
