LILIl'M. 



101 



then it, on the whole, distinctly let* sensitivity than of 

 any of the four preceding group*, particularhr a* re- 

 gard* the hybrid. At a rule, however, the data are 

 nut of much UM-fuluess excepting ia very few instaoca* 

 for chart making. Gelatiniiation is'u*jri)..or j: 

 cally complete in 15 to 30 second* jn'tfaY: w'itfi 



nitric aciu, sulphuric and, hydnVhloiu-'ii 

 hydroxide, potassium iodide, potaanium lulphocyu 

 potassium sulphide, sodium hydroxide, ami <H|IUIII ul- 

 phidc. lii tin- reliction* with nitric and, hydrochloric 

 H. id. potassium i...li,lr, potassium -ulj.li.., yunaU-, sodiuni 

 hydroxide, and odium sulphide there are distiiu t indi- 

 cations of lower reactivity of the hybrid than of Uie 

 parent*. Gclatinization goea on very rapidly in all three 

 starches during the first 1 to 3 minutes in the other 

 reactions, so that in nearly all (excepting those with 

 chloral hydrate, chromic acid, sodium salicylate, and 

 cupric chloride) at least 90 per cent of the total starch 

 is broken down within this period. In occasional in- 

 stances the hybrid ia comparatively resistant, as in the 

 reactions with chromic acid, uranium nitrate, tn>ntium 

 nitrate, cobalt nitrate, copper nitrate, cupric chloride, 

 barium chloride, and mercuric chloride, in some of 

 whic -h the resistance is quite marked or only noticeable 

 during the first minute. There are also suggestions 

 of differences in the parents, L. pardalinum showing 

 generally a marked tendency to greater resistance than 

 L. parrvi. In these reactions the hybrid is generally 

 distinctly closer to L. pardalinum than to the other 

 parent, this being in accord with the findings ip the 

 histologic and quantitative peculiarities, and in the light, 

 color, and temperature reactions. Referring to the charts, 

 it will be seen that all three curves in each reaction tend 

 to be from close to very close, the parental curves run- 

 ning together in five out of the six reactions, and the 

 hybrid with the curves of L. parryi in the sodium-sali- 

 cylate reactions. In all six charts the curves of L. parryi 

 are higher than the curves of L. jxirryi in the reactions 

 with chromic acid, cobalt nitrate, harium chloride, and 

 mercuric chloride, keeping very close together, yet show- 

 ing quite definite difference* in the reactions. The hybrid 

 curve is intermediate in the chloral-hydrate reaction; 

 distinctly the lowest in those with chromic acid, pyro- 

 gallic acid, cobalt nitrate, barium chloride, and mercuric 

 chloride; and nearly the same as L. parryi (at fir.-t inter- 

 mediate) with sodium salicylate. There is in general a 

 tendency to less reactivity of the hybrid than of the 

 parents. 



REACTION-INTENSITIES OF THE HYBRID. 



This section treats of the reaction-intensities of the 

 hybrid as regards sameness, intermediatcness, excess, and 

 deficit in relation to the parents. (Table A 29 and 

 Charts D 373 to D 378.) 



The reactivities of the hybrid are the same as those of 

 the seed parent in the iodine and calcium-nitrate reac- 

 tions; the same as those of the pollen parent in the 

 polarization reaction ; the same as those of both parents 

 in the potassium hydroxide reaction, in which the reac- 

 tions occur too rapidly for differentiation; intermediate 

 in the reactions with gentian violet, safranin, chloral hy- 

 drate, sulphuric acid, sodium salicylate, and barium chlo- 

 ride ( in four being closer to those of the pollen parent, 

 and in two closer to those of the seed parent) ; highest 

 in none ; and lowest in those with temperature, chromic 

 a. pi, pyrogallic arid, nitric acid, hydrochloric arid, po- 

 tassium iodide, potanxium nulphocyanate, potaMium sul- 

 phide. Kodium hydroxide, sodium sulphide, uranium 

 nitrate, strontium nitrate, cobalt nitrate, copper nitrate, 

 cupric chloride, and mercuric chloride (in nine being 



