...Natural science calls retrogression of species, which shows signs of aformer state already overcome, atavism... 
Various 「Mother Earth, Vol. 1 No. 1, March 1906」
...When we turn from the Tunicates to the closely-related Amphioxus we areastonished at first to find an apparent retrogression in the formation of thevascular system...
Ernst Haeckel 「The Evolution of Man」
...During this retrogression it coversthe breadth of one "decan" = ten degrees...
E. Walter Maunder 「The Astronomy of the Bible」
...(d) The retrogression of the nodes, then being observed atGreenwich by Flamsteed...
Oliver Lodge 「Pioneers of Science」
...It is true that slavery existed under Pagan civilization, but there itrepresented a phase of social development, while Christian slavery stoodfor a deliberate retrogression in social life...
Dr. D.M. Brooks 「The Necessity of Atheism」
...Similar to the retrogression of scientific thought, traced in formerchapters, is the corresponding retrogression in philosophic thought...
Dr. D.M. Brooks 「The Necessity of Atheism」
...A retrogression took place to the ideation of the mostprimitive of men, namely, the conception of physical disease as theresult of the wrath of God, or the malice of Satan, or by a combinationof both...
Dr. D.M. Brooks 「The Necessity of Atheism」
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