Meanings of great desirability in English

There is another, and that is the great desirability of every class in the community having a practical knowledge of what labour means.

Dr. Robb realizes the great desirability of finding a stronger source of Röntgen rays, and has himself begun experimenting with exhaustive bulbs made of aluminium.

Those who imagine the greater desirability of another world merely shift their desires from the earth to the skies.