পাতা:পদার্থবিদ্যাসার.djvu/১৫

4 otoli is that by which we understand, reason, reflect, နိူင္တို which connot be Bee೧. touched. - εκβ., Wisat attat?" : Tut. It is that which can be seen and felt, but which cannot reflect, &c." Pup. This I understand ; but is there mothing else particularly to be observed respecting matter? Tut. Perhaps you have heard that all matter is possessed of attractiom, extension, divisibility, solidity, form, mobility, &c. . . . . f - Pup. No, sir, I have, not : will you be so kind as to explain what is meant by these terms ? * , Tut. By attraction, it is meant that the compoment parts of things unite with each, other, and small bodies are drawn towards larger ones, and kept from falling into infinite space: thus, houses are attracted to the earth. or - r By extension, it is meant that all matter has length, breadth, and thickness. ; : , ' - w By divisibility, that it is capable of being divided into parts. , . . . * , , , &By solidity, that it is more or less hard and penetrable. , , e در • By form, that it has some shape, &c. . . . . . : By mobility, that, though in its natural state it is at rest, it is capable of being, moved, and, when put in ofton will always keep so, unless stopped by some external cause. Beside these, there are other properties ascribed to matter, but they are not óf minimiërtante,