{"product_id":"principia-vol-ii-the-system-of-the-world","title":"Principia Vol. II: The System of the World","description":"I consider philosophy rather than arts and write not concerning manual but natural powers, and consider chiefly those things which relate to gravity, levity, elastic force, the resistance of fluids, and the like forces, whether attractive or impulsive; and therefore I offer this work as the mathematical principles of philosophy. In the third book I give an example of this in the explication of the System of the World. I derive from celestial phenomena the forces of gravity with which bodies tend to the sun and other planets.","brand":"Thryft Singapore","offers":[{"title":"Like New","offer_id":49473935081753,"sku":"QA803.A45 1962","price":11.9,"currency_code":"SGD","in_stock":false},{"title":"Very Good","offer_id":49473935114521,"sku":"QA803.A45 1962","price":9.9,"currency_code":"SGD","in_stock":false},{"title":"Good","offer_id":49473935147289,"sku":"QA803.A45 1962","price":8.9,"currency_code":"SGD","in_stock":false},{"title":"Well Read","offer_id":49473935180057,"sku":"QA803.A45 1962","price":8.9,"currency_code":"SGD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0110\/0598\/4849\/files\/1785267.jpg?v=1723122447","url":"https:\/\/thryft.sbs\/products\/principia-vol-ii-the-system-of-the-world","provider":"Thryft","version":"1.0","type":"link"}