Meanings of gradual amelioration in English

It is probable, that, on the whole, there is a gradual amelioration in female costume.

This excessive degree of cold only lasted three days, and then a gradual amelioration of temperature was felt.

Science has familiarized men with the idea of development, taking effect practically in persistent gradual amelioration of the estate of our common humanity.

I trust that those who have accompanied me through the chapters of this work, will have been able to trace a gradual amelioration in humour.

Matters were sufficiently serious to induce the authorities to allow gradual amelioration of the conditions, and by degrees food of a better class was introduced.