ion of functions to altered conditions of growth.

CONCLUDING STATEMENTS

Enough has been said to show how very inconclusive and unsatisfactory is
our knowledge of the phenomena known as "adaptation." Even the nomenclature
used by different scientists to describe its various manifestations is
confused and misleading. For example, certain crops are said to be
"adapted" (i.e., suited) to certain types of soils, and _vice versa_; crops
are said to be "adapted" to given agricultural districts, etc.

In this chapter, an attempt has been made to arrange in some semblance of
order some of the known manifestations of alteration of fixed habits of
growth of plants in response to changes of environment, and to point out
some of the suggestions of possible explanations of these phenomena which
have been presented by different investigators.

This presentation cannot be considered as anything other than an
introduction to a field of study which is as yet almost entirely
unexplored, and, like all other unexplored territory, is full of mysteries.
If the study of this chapter serves to stimulate interest in these
mysteries and wonders of plant life, its purpose will have been
accomplished.

INDEX

Bold-face figures indicate main references

Accelerators, 196.
Accessory substances, 19.
Achroo-dextrin, 61.
Acid, acetic, 125, 126, =128=, 132, 133, 166.
arabic, 68.
arachidic, 133.
aspartic, 168, 177.
brassic, 133.
butyric, 126, 133.
capric, 133.
caprylic, 133.
carnaubic, 140.
cerotic, 133, 140.
citric, 125, 127.
convolvulinic, 81.
crotonic, 133.
diamino-oxysebacic, 169.
diamino-trioxydodecanic, 169.
digallic, 96.
ellagic, =96=.
euxanthic, 84.
formic, 25, =126=, 128, 132.
galactonic, 42.
gallic, =96=.
geddic, 69.
gluconic, 42.
glucuronic, 42, 43.
glutamic, 168, =177=.
glycero-phosphoric, 142.
hydrocyanic, 77.
jalapinic, 81.
lauric, 133.
lignoceric, 133.
linoleic, 133.
linolenic, 133.
malic, 124, =127=.
malonic, 124.
mannonic, 42.
melissic, 133.
meta-pectic, 68, =70=.
mucic, 68.
myristic, 133.
nitric, 125.