To the natural philosopher, to whom the whole extent of nature belongs, all the individual branches of science constitute the links of an endless chain, from which not one can be detached without destroying the harmony of the whole.
Source, in full
The Book of Nature: An Elementary Introduction, translated from the 6th German edn. by Henry Medlock (Philadelphia, PA: Blanchard and Lea, 1853) "Astronomy", p. 140. Reported in Hoyt's New Cyclopedia of Practical Quotations (1922) p. 692