WEEK BY WEEK.

The prevalence of wet weather has had a painful effect on the aspect of the metropolitan streets. We do not refer so much to their having been universally inundated with rain, but rather to the absence from them of those pretty dresses in which it is customary for ladies to disport themselves during sunny weather. For instance, it was calculated the other day by a well-known wrangler, that if the tangential surface of a Bond Street pavement be represented by the formula:

x(π + y^nth) = y + x - ^π⁄x,

the decrease in the number of pedestrians appearing on a wet day may be set down as 18426 ¹⁄52.

A Correspondent calls our attention to the prevalence of green on the various trees of the Metropolis. "This phenomenon," he observes, "is noticeable in May and early June every year. Some trees are greener than others, whilst others scarcely come up to the standard of leafy verdure displayed by their fellows. Taking the trees in the Park and arranging them in the inverse ratio of their distances at rectangular intervals from the common centre of their growth, it will be found that the surface area of a Plane-tree is equal to exactly five hundred times the cubic capacity of a gooseberry bush, measured from a point on its inner circumference."

Miss Robinson, Mrs. Touche-Arming, and Lady Cordelia Crossbit, were photographed yesterday. We hear that excellent likenesses of these brilliant ornaments of the Upper Ten have been secured.

The wonderful tameness and docility of the three African lions now going through their daily performance at the French Exhibition at Earl's Court, have astonished no less than pleased all who have witnessed them, but it is not generally known, that their obedient condition is due to their diet. This has for some time consisted of a well-known infant's and invalid's food, washed down with copious draughts of a widely advertised patent medicine that claims to act as "a special brain and nerve tonic," and it is this last that it is said is responsible for the quenching of the natural ferocity and utter prostration of spirit which enables their talented trainer, together with the watchful attentions of a highly intelligent boar-hound, to put them through a series of playful and innocent tricks, hitherto associated rather with the entertaining efforts of the skilled and educated guinea-pig than with the masterly ferocity of the monarch of the desert. [Oh yes! We're not going to allow an advertisement to be sneaked in like this. But as we required a paragraph to fill up space, here it is, with name and address of Infant's Food provider omitted! Aha!—Ed.]