Commentary Critical and Explanatory on the Whole Bible - Genesis 1:6
6. firmament—an expanse—a beating out as a plate of metal: a name given to the atmosphere from its appearing to an observer to be the vault of heaven, supporting the weight of the watery clouds. By the creation of an atmosphere, the lighter parts of the waters which overspread the earth's surface were drawn up and suspended in the visible heavens, while the larger and heavier mass remained below. The air was thus "in the midst of the waters," that is, separated them; and this being the apparent... read more
Thomas Coke Commentary on the Holy Bible - Genesis 1:6
Genesis 1:6. Let there be a firmament in the midst of the waters— After having given an account of the generation of light, the sacred writer goes on to inform us of the generation of the air, or of that expansive element which fills the space between the earth and the highest regions, and which goes under the general name of the heavens. This air, in its first created state, was intermixed with the other elements in the chaotic mass; upon which a motion having been impressed by the divine... read more