পাতা:পদার্থবিদ্যাসার.djvu/১৩৯

oš manner: “She places herself upon the end of a branch, or some other projecting body, and there fastens her thread: after which she presses out unore long threads, which she leaves floating in the air: these threads are wafted by the wind from one side to another, and are there sistened by their natural glue ; she afterwards draws them to her, to try if they are well fixed, and then they become a bridge, over which the spider passes and repasses al pleasure.” w Others are of opinion, as these are often seen when there is no wind to wast them over, that after having fixed the thread on one side, dropping theim to the ground, they carry the thread themselves; and mounting where they want to fix it, there draw and fasten it. Pup. Are there a great many kinds of spiders? Tut. There are, I believe, about 130 distinct species under the genus spider, or Aranea. They are found in all parts of the world. - Pup. How are the different species of the spider know n : Tut. Chiefly from the situation of their eyes. Pup. IHow wamy ey es have spiders? Tut. Generally eight: and in some species, these eight eyes are arranged in the form of a quadrangle; in some they form a semi-circle in front, and three tie parallel to each other behind: in others they form two parallel lines of four eyes each. Pup. On what do spiders chiefly live Tut. Upon any insects that they can overcome; aud even upon one another. They cast their skins once a year, which they perform by suspending themselves in some corner, and creeping out of it. The ravenous