and its Relation to Impermeable Seeds of Sweet Clover.
Historical summary 26
Material and methods 30
Structure of the seed coat 31
Microchemistry of the seed coat 33
The seed coat in relation to the absorption of water 34
A comparison of permeable and impermeable seed coats 34
The action of sulphuric acid on the coats of impermeable seeds 35
Literature Cited 36