[142]

Miller's Chemistry Vol I p. 11.

The greater the difference of the 2 bodies the more intense is their tendency to mutual chemical action —

Can it be in the reign of organic chemistry, that there may be too great a difference

But it is not only union, but the growth of resultant organism.—

Miller, William Allen. 1864. Elements of chemistry: theoretical and practical. Part II. Inorganic chemistry. 3d ed. London: Longman, Green, Longman, Roberts & Green. [Francis Darwin][Darwin Library-Down] PDF Cross and self fertilisation, p. 456: "As Professor Miller remarks: "Generally speaking, the greater the difference in the properties of two bodies, the more intense is their tendency to mutual chemical action...But between bodies of a similar character the tendency to unite is feeble."*
* 'Elements of Chemistry' 4th edition 1867 part i. page 11. Dr. Frankland informs me that similar views with respect to chemical affinity are generally accepted by chemists."