Crossword-Solution: ISOTHERMAL 10 letters, 3 clues 🏆 scrabble score: 15

But what gives epochal character to the paper is the introduction of those isothermal lines circling the earth in irregular course, joining together places having the same mean annual temperature, and thus laying the foundation for a science of comparative climatology.

But Humboldt's isothermal lines for the first time gave tangibility to these ideas, and made practicable a truly scientific study of comparative climatology.

Match the two broken pieces of the Union, and you will find the fissure that separates them zigzagging itself half across the continent like an isothermal line, shooting its splintery projections, and opening its reentering angles, not merely according to the limitations of particular States, but as a county or other limited section of ground belongs to freedom or to slavery.

Herbert and I, traveling north one summer, fancied that we could draw in New England a sort of diet line, like the sweeping curves on the isothermal charts, which should show at least the leading pie sections.

The extension on the American continent of the range of erratics during the Post-pliocene period to lower latitudes than they reached in Europe, agrees well with the present southward deflection of the isothermal lines, or rather the lines of equal winter temperature.