34 



THE COTTON PLANT IN EGYPT chap. 



cone. AVhen plants are sown at wide intervals, this conical 

 form is maintained, the principal laterals extending radi- 

 ally by the autumn to distances of over two metres 



Dec. 15th. or 8 months 



Soil 

 surface 



Notes:- The new roots shown are those from 

 a single lateral only. 

 For effects of asphyxiation, see sowing 

 of March 28th. in Fig. 30. 



Note:- 86 laterals, 

 (with many tertiariesj 

 on this one root. 

 Aged 38 days. 



Note:- 

 No 

 laterals^ 



Fig. 35. — The Root : Development, Asphyxiation, and Regeneration. 

 Scale drawings from measurements. 



(Fig. 37) ; the irregular base of the inverted cone thus 

 becomes about five metres in diameter, while its depth 

 may exceed two metres. When the plants are closely 



