The article on _Man_, as a branch of natural history, contains a correct if a rather superficial account of that curious animal; at length the writer comes to a table showing the probable duration of life at certain ages.

"You will observe," he says, "1st, that the age of seven is that at which you may hope a longer life; 2d, that at twelve or thirteen you have lived a quarter of your life; at twenty-eight or twenty-nine you have lived half; at fifty more than three-quarters." And then he suddenly winds up the whole performance by the exclamation: "O ye who have laboured up to fifty, who are in the enjoyment of comfort, and who still have left to you health and strength, what then are you waiting for before you take rest?
How long will you go on saying _To-morrow, to-morrow ?_" There are many casual brilliancies in the way of analogy and parallel, many aptnesses of thought and phrase.

The Stoics are called the Jansenists of Paganism.

"For a single blade of grass to grow, it is necessary that the whole of nature should co-operate." "A man comes to Pyrrhonism by one of two opposite ways; either because he does not know enough, or because he knows too much; the latter is not the most common way." And so forth.
If we turn to the group of articles dealing with theology, it is difficult for us to know exactly where we are.

Sometimes Diderot writes of popular superstitions with the gravity proper to a dictionary of mythology.