HIPPEA8TKUM. 



45 



Keaction-intensities of the Hybrid. 



This section treats of the reaction-intensities of the 

 hybrid as regards sameness, intermediateness, excess, 

 and deficit in relation to the parents. (Table A 4 and 

 Charts D 64 to D 84.) 



The reactivities of the hybrid are the same as those 

 of the seed parent in not a single reaction ; the same as 

 those of the pollen parent with iodine and sulphuric acid ; 

 the same as those of both parents with safranin, potas- 

 sium sulphide, calcium nitrate, uranium nitrate, cobalt 

 nitrate, copper nitrate, cupric chloride, barium chloride, 

 and mercuric chloride; intermediate with hydrochloric 

 acid, potassium hydroxide, potassium iodide, potassium 

 sulphocyanate, sodium hydroxide, and strontium nitrate 

 (in three reactions being closer to those of the seed parent 

 and in three mid-intermediate) ; highest with polariza- 

 tion, temperature, chromic acid, pyrogallic acid, and 

 nitric acid (in one being closer to the pollen parent, in 

 three closer to the seed parent, and in one as close to one 

 as to the other parent) ; and the lowest with gentian 

 violet, chloral hydrate, sodium sulphide, and sodium 

 salicylate (in two being closer to the pollen parent, in one 

 closer to the seed parent, and in one as close to one as 

 to the other parent) . 



The following is a summary of reaction-intensities : 

 Same as seed parent, ; same as pollen parent, 2 ; same 

 as both parents, 9 ; intermediate, 6 ; highest, 5 ; lowest, 4. 



In none of the reactions is there sameness to the seed 

 and in only two is there sameness to the pollen parent; 

 and intermediateness is scarcely more frequent than de- 

 velopment in excess or deficit of parental extremes. Pa- 

 rental influences on the starch of the hybrid seem to be 

 somewhat in favor of the seed parent. 



Composite Curves of the Reactioit-intensxties. 



This section treats of the composite curves of the 

 reaction-intensities showing the differentiation of the 

 starches of Hippeastrum dxones, H. zephyr, and H. 

 doBones-zephyr. (Chart B- 4.) 



The most conspicuous features of this chart are: 



(1) The closeness of all three curves. 



(2) The curve of H. doeones, excepting in the pola- 

 rization reaction, is higher than the corresponding reac- 

 tions of H. zephyr in the reactions vnth iodine, gentian 

 violet, chloral hydrate, chromic acid, pyrogallic acid, 

 nitric acid, sulphuric acid, hydrochloric acid, potassium 

 hydroxide, potassium iodide, potassium sulphocyanate, 

 sodium hydroxide, sodium sulphide, and strontium ni- 

 trate; lower with polarization; and the same or practi- 

 cally the same with safranin, temperature, potassium 

 sulphide, sodium salicylate, calcium nitrate, uranium ni- 

 trate, cobalt nitrate, copper nitrate, cupric chloride, 

 barium chloride, and mercuric chloride. 



(3) In H. dcBones, the very high reactions with 

 polarization, chromic acid, and sulphuric acid ; the high 

 with pyrogallic acid and sodium salicylate ; the moderate 

 reactions with iodine, gentian violet, safranin, and hy- 

 drochloric acid; the low reactions with temperature, 

 chloral hydrate, nitric acid, potassium hydroxide, potas- 

 sium sulphocyanate, and sodium hydroxide ; and the very 

 low reactions with potassium iodide, potassium sulphide, 

 sodium sulphide, calcium nitrate, uranium nitrate, 

 strontium nitrate, cobalt nitrate, copper nitrate, cupric 

 chloride, barium chloride, and mercuric chloride reactions. 



(4) In H. zephyr,- the very high reactions with polar- 

 ization and sulphuric acid ; the high with chromic acid, 

 pyrogallic acid, and sodium salicylate; the moderate 

 with iodine, gentian violet, and safranin; the low with 

 temperature, nitric acid, hydrochloric acid, potassium 

 hydroxide, and potasium sulphocyanate; the very low 

 with chloral hydrate, potassium iodide, potassium sul- 



