SYNOPSIS xiu 



PAGB 



Chaptee v. — Hazel Nuts - - - 82 



Difference in structure from the Acorn. First sign of 

 life. Protrusion of the radicle. Seedlings illustrated 

 and described. Want of uniformity in development, 

 illustrated and examples given. 



Chapter VI. — Horse-Chestnuts - - - 88 



Position of the embryo and attachment of the coty- 

 ledons. Probable shape of the latter. A young seed- 

 ling, illustrated and described. The question of insula- 

 tion after rupture of the seed coat. Does the seed 

 supply nutriment to the seedling ? The growing 

 seed in section. Part of seed from which growth issues. 

 Other seedlings. Root development. Protection from 

 actinic rays. Galvanometric tests. Theory of a 

 synapse at the posterior part of the plumule. Elec- 

 trical balance between root and foliage development. 

 More advanced seedlings, illustrated and described. 



Chapter VII. — Soil and Water - - - 97 



Electrical conductivity of the soil not so far taken into 

 account. Dr. Russell on pan formation. Dry soil not 

 conductive of electricity. Water mainly required as 

 an electrolyte. Soil conductivity rises and falls with 

 rise and fall of temperature. Pan formation electri- 

 cally considered. Distribution of electrolytes in the 

 soil. Faults or breaks of continuity, their probable 

 effect upon vegetation and a suggested remedy. The 

 Loddington, Dicker and Shopwyke soils. Tempera- 

 ture in its relation to soil conditions. Late autumn and 

 early spring compared with summer and early autumn. 

 Forcing. Necessity of restricting rise of temperature 

 within narrow limits. Effect of low vitality. Upward 

 versus doAvnward driving force. High electrification 

 harmful to the plant. High tension currents. Water. 

 The relationship between food supply and water 

 requirements. Water as an electrolyte. Dr. Russell 

 upon the question. My own experiments and their 

 bearing upon it. Grasses with ferrous sulphate as the 

 electrolyte plus electrical stimulation. 



