Well's natural philosophy : for the use of schools, academies and privte students, introducing the latest results of scientific discovery and research ; arranged with special reference to the practical application of physical science to the arts and the experiences of everyday life ; with three hundred and seventy-five engravings (1873)
Wells, David A · New York : Ivison, Blakeman, Taylor and Co. · leaf 430
ions upon the earths surface.What is the 799. The direction assumed by a horizontal magnsUc mend- n « unf needle m any given place upon the earths surface, is called the magnetic meridian, A terrestrial meridian, it will be remembered, is a great cir-cle, supposed to be drawn around the earth,… … What is a ter-restrial merid-ian? 426 WELLSS NATUEAL PHILOSOPHY. of a needle which would point due north and south at any place, wiU bethe true, or terrestrial meridian of that place. What is the The deviation of the needle from the truedSHono? north and south, or the angle formed by thethe needle?…
Physics · Science · Technology
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