Elements of Natural Philosophy, Etc

acid alkalis animals annual appears aqueous humour atmosphere attraction axis become Birds blood bodies brittle called Cancer CHAP circle clouds cold colour comets considerable creatures degree diameter discovered distance ductile Earth considered eclipse eggs equal equator external felspar fire fish fixed stars Fossils furnished globe greater heat heavens hence high water hour Human Frame humour ideas inhabitants insects kind less Matter and Motion membrane meridian metals Meteors miles mind mineral minutes moon move nature noble metal north pole northern observed opaque ophite orbit oviparous papillæ particles perception perfect perspiration planets porphyry produce proportion quadrupeds quantity rain rays of light rivers round the sun schorl season seeds Solar System solid space species specific gravity springs stones substances sulphur sun's supposed surface trees tropic tropic of Cancer tropic of Capricorn vapours variety various vegetable velocity viviparous weight whence whole wind