| Description Of Item | The fourth volume of lectures by John Walker is on hydrography and includes: history of the waters of the earth, water, hail water, snow water, rain water, lake water, water of the dew, spring water, natural history of the ocean, water sprouts, whirlpools, cataracts. It has annotations both to the text and on the page facing the text. Loose notes at the front on the wind. Lectures 13-18. |