

REACTION-INTENSITIES OP THE HYBRIDS. 



This section treats of the reaction-intensities of the 

 hyl-nds as regards sameness, mtermediateness, excess, 

 nd deficit in relation t<> the parents. (Table A 11 and 

 Charts D211 to D231.) 



The reactivities of the hybrid X. giantess are the 

 same as those of the seed parent in the reactions with 

 irnitian violet and safranin; the same as those of the 

 ; parent with iodine, chloral hydrate, sulphuric 

 acid, .-'.hum salicylate, calcium nitrate, and uranium 

 nitrate; and the same as those of both parents with 

 pyrogallic acid, potassium hydroxide, sodium sulphide, 

 cobalt nitrate, cupric chloride, barium chloride, ana mer- 

 curic chloride, in all of which the reactions are too fast 



-> slow for differentiation ; intermediate with chromic 

 acid, potassium iodide, potassium sulphocyanate, potas- 

 Minn sulphide, strontium nitrate, and copper nitrate (in 

 three \*-\ng mid-intermediate, in one nearer the seed 

 parent, and in two nearer the pollen parent) ; highest in 

 the temperature reaction, and nearer the seed parent; 

 and lowest in the reactions with polarization, nitric acid, 

 hydrochloric acid, and sodium hydroxide (in one being 

 as near as the other parent, in one nearer the aeed parent, 

 and in one nearer the pollen parent). 



The reactivities of the hybrid N. abundance are the 

 same as those of the aeed parent in the reactions with 

 iodine, temperature, and sulphuric acid; the same as 

 those of the pollen parent with gentian violet, potassium 

 iodide, and sodium salicylate ; the same as those of both 

 ts with pyrogallic acid, potassium hydroxide, so- 

 dium sulphide, cobalt nitrate, cupric chloride, barium 

 chloride, and mercuric chloride, in all of which the reac- 

 tions are too fast or too slow for differentiation ; inter- 

 mediate with safranin, potassium sulphide, and strontium 

 nitrate (in two being closer to the seed parent, and in 

 one closer to the pollen parent) ; highest with tempera- 

 ture and chloral hydrate, in the former being closer 

 to the seed parent and in the latter to the pollen parent; 

 and lowest with polarization, chromic acid, nitric acid, 

 hydrochloric acid, potassium sulphocyanate, sodium hy- 

 droxide, calcium nitrate, uranium nitrate, and copper 

 nitrate (in one being as close to one parent as to the 

 other, in one closer to the seed parent, and in seven closer 

 to the pollen parent). 



COMPOSITE CURVES or THE REACTION-INTENSITIES. 



This section treats of the composite curves of the 

 reaction-intensities, showing the differentiation of the 

 starches of tf trine bovdeni, N. samiensis var. corusca 

 major, N. gianltss, and Jf. abundance. (Chart E 11.) 



The most conspicuous features of this chart are : 



( 1 ) The very close correspondence in the rises and 

 falls of the curves of the parents, excepting in the reac- 

 tions with chloral hydrate and potassium sulphide, the 

 same peculiarity having been noted in the preceding set, 

 excepting that in this set the potassium-sulphide curves 

 retain the same relative positions, the disagreement in 

 the latter being attributable to the relatively low reac- 

 tivity of .V. bovdeni. 



(2 ) .V. bovdeni has higher reactivities than the other 

 parent (X. sarnitnsit var. corusca major) with gentian 

 violet, safranin, temperature, chromic acid, nitric acid, 

 potassium iodide, potassium sulphocyanate, sodium hy- 



6 



le, calcium nitrate, uranium nitrate, and copper 

 nitrate; lower with polarization, iodine, chloral hydrate, 

 sodium salicylate, and strontium nitrate ; and the same 

 or practically the same with pyrogallic acid, sulphuric 

 acid, hydrochloric acid, potassium hydroxide, potassium 

 nulphide, sodium sulphide, cobalt nitrate, cupric chloride, 

 barium chloride, and mercuric chloride. 



(3) In N. bovdeni the very high reactions with 

 polarization, sulphuric acid, and potassium hydroxide; 

 the high reactions with chromic acid, hydrochloric acid, 

 and sodium salicylate ; t he moderate reactions with iodine, 

 gentian violet, safranin, nitric acid, potassium sulpho- 

 cyanate, and strontium nitrate; tin- low reactions with 

 temperature, chloral hydrate, and potassium sulphide; 

 the very low reactions with pyrogallic acid, potassium 

 iodide, sodium hydroxide, sodium sulphide, calcium ni- 

 trate, uranium nitrate, cobalt nitrate, copper nitrate, 

 cupric chloride, barium chloride, and men -urn- < -Monde. 



(4) In N. tarniensis var. corusca major the very high 

 reactions with polarization, sulphuric acid, potassium 

 hydroxide, and sodium salicylatc ; the high reactions with 

 iodine, chloral hydrate, hydrochloric acid, and strontium 

 nitrate ; the moderate reactions with gentian violet, safra- 

 nin, chromic acid, and nitric arid ; the low reactions with 

 temperature, potassium sulphocyanate, and potassium 

 sulphide; and the very low reactions with pyrogallic 

 acid, potassium iodide, sodium hydroxide, sodium sul- 

 phide, calcium nitrate, uranium nitrate, cobalt nitrate, 

 copper nitrate, cupric chloride, barium chloride, and 

 mercuric chloride. 



(5) In the hybrid A T . giantess the very high reactions 

 with polarization, sulphuric acid, potassium hydroxide, 

 and sodium salicylate; the high reactions with iodine, 

 chloral hydrate, hydrochloric acid, and strontium nitrate ; 

 the moderate reactions with gentian violet, safranin, 

 temperature, chromic acid, and nitric acid ; the low reac- 

 tions with potassium sulphocyanate and potassium sul- 

 phide ; and the very low reactions with pyrogallic acid, 

 potassium iodide, sodium hydroxide, sodium sulphide, 

 calcium nitrate, uranium nitrate, cobalt nitrate, copper 

 nitrate, cupric chloride, barium chloride, and mercuric 

 chloride. 



(6) In the hybrid N. abundance the very high reac- 

 tions with polarization, sulphuric acid, potassium hydrox- 

 ide, and sodium salicylate ; the high reactions with chloral 

 hydrate and hydrochloric acid ; the moderate reactions 

 with iodine, gentian violet, safranin, chromic acid, nitric 

 acid, and strontium nitrate ; the low reactions with tem- 

 perature and potassium sulphide ; and the very low reac- 

 tions with pyrogallic acid, potassium iodide, potassium 

 sulphocyanate, sodium hydroxide, sodium sulphide, cal- 

 cium nitrate, uranium nitrate, cobalt nitrate, copper 

 nitrate, cupric chloride, barium chloride, and mercuric 

 chloride. 



The following is a summary of the reaction -intensi- 

 ties: 



