146 APPENDIX II 



VIII. Onion Seedlings need about twenty days for the 

 cotyledon to develop well and to pull the seed-coats out of 

 the ground, and a week or two longer before any plumule 

 will show. 



IX. Pine Seedlings are not very easy to obtain. The 

 smaller seeds (of such species as Pinus Laricio and P. Aus- 

 triaca}, after soaking for about forty-eight hours, were 

 planted and began to appear in eighteen to twenty days ; 

 but the larger seeds (of P. Lambertiana and P. Pinea) did 

 not appear until after thirty (P. Pinea) to fifty-three days 

 (P. Lambertiana}. Pine seeds may be obtained from the 

 larger seed dealers, but few out of many sown are likely to 

 germinate. 



CHAPTER III 



ROOTS 

 General Reading 



Kerner and Oliver, Volume I, Part 2, pp. 749-767 ; I, Part i, 



pp. 82-99. 



Allen, The Story of the Plants, pp. 53-63. 

 Gray, Text-book, pp. 27-33. 

 Gaye, The Great World's Farm, pp. 124-148. 



I. This use of " secondary root " and of " adventitious 

 root" is contrary to that of Gray's Text-book, but is 

 more in accord with the general usage of secondary and 

 adventitious. 



II. Squash Seedlings are not always easy to raise within 

 doors. Care should be taken to get " sound " seed and not 

 to keep the soil too damp. A few good seedlings preserved 



