๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

An Ecological Aspect of the Conception of Species

โœ Scribed by H. C. Cowles


Book ID
123835718
Publisher
University of Chicago Press
Year
1908
Tongue
English
Weight
511 KB
Volume
42
Category
Article
ISSN
0003-0147

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An indicator is something which makes visible, audible or perceptible which in itself is not visible, audible or perceptible. Many times indicators concern rather concrete matters, that might be experienced also in a more direct way. Acidity can be tasted, but a pH-meter is a better instrument. If s