70 



HISTOLOGIC PROPERTIES AND REACTIONS. 



a cross; with selenite the quadrants are not so well 

 defined and are more irregular in shape and size, the 

 colors are not so pure, and there are fewer grains having 

 a greenish tinge ; with iodine the raw grains become more 

 bluish and of a somewhat deeper tint, while the gela- 

 tinized grains and grain residues color less but the solu- 

 tion more. In the qualitative reactions with the various 

 chemical reagents there are various differences. The 

 starch of the hybrid N. poeticus herrick is in form, char- 

 acters of the hilum, and characters of the lamella closer 

 to N. poeticus ornatus than to the other parent, but in 

 size the reverse. In polariscopic figure and appearances 

 with selenite it is closer to 2V. poeticus ornatus; but in 

 degree of polarization, the reverse. In the qualitative 

 iodine reactions it is closer to N. poeticus poetarum. 

 In the qualitative reactions with chloral hydrate, chromic 

 acid, pyrogallic acid, nitric acid, and sulphuric acid it is 

 closer to N. poeticus poetarum. The starch of the hybrid 

 N. poeticus dante is in form closer to N. poeticus than 

 to the other parent, but in the characters of the hilum, 

 in lamella, and in size it is closer to the other parent 

 N. poeticus poetarum. In the polariscopic figure and 

 reactions with selenite it is closer to N. poeticus poe- 

 tarum. In the qualitative iodine reactions it is closer 

 to N. poeticus poetarum. In the qualitative reactions 

 with chloral hydrate, chromic acid, pyrogallic acid, nitric 

 acid, and sulphuric acid it shows a closer relationship to 

 N. poeticus poetarum. The starch of the hybrid JV. 

 poeticus dante is more rounded than that of the other 

 hybrid, and it does not show as close a relationship to 

 N. poeticus ornatus. In character and eccentricity of 

 the hilum it shows as close a relationship to N. poeticus 

 poetarum as does that of the other hybrid to the other 

 parent, and in the characters of the lamellae the same 

 holds true. In size it is larger than in the other hybrid, 

 and therefore not so close to N. poeticus poetarum, yet it 

 is closer to it than to the other parent. In polariscopic 

 figure and appearances with selenite both hybrids bear 

 the same relationship to the parents, and in the iodine- 

 qualitative reactions there are no differences between the 

 hybrids. In the qualitative chemical reactions the starch 

 of the hybrid N. poeticus dante bears a closer relation- 

 ship than the starch of the other hybrid N. poeticus 

 herrick to N. poeticus poetarum in the chloral-hydrate 

 reaction, but not so close a relationship to this parent 

 in the reactions with chromic acid, pyrogallic acid, nitric 

 acid, and sulphuric acid. 



Reaction-intensities Expressed by Light, Color, and Tempera- 

 ture Reactions. 

 Polarization: 



N. poet, ornatus, low to very high, value 50. 



N. poet, poetarum, low to very high, lower than in N. poet, ornatus, 



value 40. 

 N. poet, herrick, low to very high, somewhat lower than in N. poet. 



ornatus, value 47. 

 N. poet, dante, low to very high, somewhat lower than in N. poet. 



ornatus, value 47. 

 Iodine: 



N. poet, ornatus, light to moderate, value 40. 



N. poet, poetarum, moderate, somewhat higher than in N. poet. 



ornatus, value 45. 

 N. poet, herrick, moderate, the same as in N. poet, poetarum, 



value 45. 



N. poet, dante, moderate, the same as in N. poet, poetarum, 

 value 45. 



Gentian violet: 



N. poet, oruatus, light to moderate, value 30. 



N. poet, poetarum, light to moderate, somewhat deeper than in 



N. poet, ornatus, value 35. 

 N. pool, herrick, light to moderate, lighter than in either parent, 



value 25. 

 N. poet, dante, light to moderate, the same as in N. poet, poetarum, 



value 35. 

 .Safranin: 



N. poet, ornatus, moderate, value 45. 



N. poet, poetarum, moderate, somewhat deeper than in N. poet. 



oruatus, value 50. 

 N. poet, herrick, light to moderate, lighter than in either parent, 



value 40. 

 N. poet, daute, moderate, the same as in N. poet, poetarum, 



value 50. 

 Temperature: 



N. poet, ornatus, in majority at 73 to 74, in all at 77 to 78, 



mean 77.5. 

 N. poet, poetarum, in majority at 67 to 69, in all at 71 to 73, 



mean 72. 

 N. poet, herrick, in majority at 69 to 71, in all at 76 to 78, 



mean 77. 

 N. poet, dante, in majority at 71.2 to 73.1, in all at 74 to 76, 



mean 75. 



N. poeticus ornatus exhibits a higher reactivity than 

 the other parent in the polarization reactions, and lower 

 reactivities in those with iodine, gentian violet, safrauin, 

 and temperature. The hybrid N. poeticus herrick is 

 higher than N. poeticus and lower than N. poeticus poe- 

 larum in the temperature reactions ; the same as the latter 

 parent in the iodine reaction; intermediate in polariza- 

 tion reaction; and the lowest in the reactions with 

 gentian violet and safranin. The hybrid N. poeticus 

 dante has the same or practically the same reactivity 

 as N. poeticus ornatus in no reaction ; the same or prac- 

 tically the same reactivity as N. poeticus poetarum in the 

 reactions with iodine, gentian violet, and safranin; and 

 intermediate in the polarization and temperature reac- 

 tions. The two hybrids are alike in the polarization and 

 iodine reactions, but N. poeticus herrick has lower reac- 

 tivities than the other hybrid in the reactions with gen- 

 tian violet, safranin, and temperature. 



TABLE A 13. 



