Charles H. Spurgeon on Psalms 135:7

He causeth the vapours to ascend, etc. There is no physical necessity that the boiling point of water should occur at two hundred and twelve degrees of the Fahrenheit scale. As far as we know, it might have been the same with the boiling points of oil of turpentine, alcohol or ether. We shall see the benevolence of the present adjustment by noticing some of the consequences which would follow if any change were made. The amount of vapour given off at ordinary temperatures by any liquid depends on the temperature at which it boils. If the boiling point of water were the same as that of alcohol, the vapour given off by the ocean would be two and a half times as much as at present. Such an excess of aqueous vapour would produce continual rains and inundations, and would make the air too damp for animal, and too cloudy for vegetable, life. If water boiled at the same temperature as ether, the vapour rising from the ocean would be more than twenty-five times as much as at present. In such a state of things no man could see the sun on account of the clouds; the rain would be so excessive as to tear up the soil and wash away plants; inundations would be constant, and navigation would be impossible in the inland torrents which would take the place of our rivers. In winter the snow of one day might bury the houses. If, on the other hand, water boiled at the same temperature with oil of turpentine, the vapour given off by the ocean would be less than one fourth of its present amount. In this case rain would be a rarity, like an eclipse of the sun, the dryness of the desert of Sahara would be equalled in a large part of the globe, which would, therefore, be bare of vegetation, and incapable of sustaining animal life. Plants would be scorched by unclouded sunshine, springs and rivulets would be dry, and inland navigation would cease; for nearly all the rain would be absorbed by the porous earth. We see, then, that the boiling point of water has been adjusted to various relations. It is adjusted to the capacity of space to contain aqueous vapour h transparent state; if it were higher than two hundred and twelve degrees, earth would be scorched by an unclouded sun; if it were lower, it would under continual shade. It is suited to the demand of plants for water; if it were higher, they would suffer from drought; if it were lower, they would torn up by floods. It is in harmony with the texture of the soil: if it higher, the earth would absorb all the rain which falls; if it were lower, the would often be washed away by the surface torrents after a shower. It is to the elevation of the continents above the sea; if it were higher, rivers their present inclination would be so shallow as to be often dry; if it lower, most rivers would be so deep as to be torrents, while the land would covered with floods. —Professor Hemholtz.