M M.MARIES OF THE HISTOLOGIC CHARACTERS, ETC. 



325 



causing gelatinization, gives rise to conspicuous] 



an intermediate parent-phase. In 10 of the H 3tarches 

 sulphuric acid developed sameness as the seed parent, and 

 in only 3 sameness as the pollen parent; potassium sul- 

 phocyanate developed Bameness as seed par* nl in 6 ol 

 the 3'i reactions and sameness as the pollen pareni in our 

 only; potassium sulphide, in 5 and '.'. respectively; 

 strontium nitrate, in 5 and 0, respectively, and bo on. 

 Certain other reagents exhibil a reversal of these pro- 

 pi Qsities, as is noted particularly in the reactions of 

 chloral hydrate, sodium salicj late, and cupric chloride, in 

 which are found ratios l : ii, L:4, and 3:3, respectively. 

 But in the intermediate, highest, and lowest columns, 

 many reactions are recorded that are closer to one than to 

 the other parent, and when these are added to the firsl 

 two columns, as m the summary of Table E, the pro- 

 pensities are in some instances practically unaltered, 

 in others accentuated, and in others lessened or reversed. 

 It will l>e seen by comparing the two summaries that in 

 the first in the polarization reactions 11 arc the same as 

 those of the seed parent and 11 the same as those of the 

 pollen parent ; and m the second an almost equal division, 

 26 and 20, respectively. In the iodine reactions the 

 figures in the two tables are 1G: L2 and 25: 18, respec- 

 tively — a ratio of 1:0.75 and 1:0.72, respectively; in 

 both of these reactions there being no essential difference 

 in the two tables. In the temperature of gelatinization 

 reactions the first table gives 7 : 3, and the second 29 : 18, 

 or ratios of 1:0.43 and 1:0.62, which show a slight 

 falling off in the latter. In the chloral-hydrate reactions 

 the first table shows a marked propensity to the pollen 

 parent, and the second a propensity to one about as much 

 as to the other; on the other hand, in the chromic- 

 acid reactions in the first table there is shown a ratio 

 of 4 : 3 and in the second table 31 : 12, or in the latter 

 two and a half times the propensity to develop sameness 

 or closeness to the seed parent as to the pollen parent. In 

 other words, it seems that certain reagents, while having 

 definite propensities to develop a seed or pollen phase, 

 show varying degrees in their propensities to elicit same- 

 ness or closeness, some tending comparatively largely to 

 sameness and little to closeness, and others the reverse, 

 and so forth. Moreover, while a given reagent may have 

 a propensity to elicit sameness as one parent, it maj 

 have at the same time a marked propensity to develop 

 closeness to the other parent in other starches, so that 

 in the summing up of the reactions with different 

 starches one may counterbalance the other. This is 

 illustrated in the chloral-hydrate reactions, in which it 

 is shown in the two summaries that the propensity to 

 elicit sameness to the pollen parents is 6 tunes gri 

 than to sameness to the other parent, while it is also 

 shown that because of a propensity to develop 

 to the seed parent the former difference is dissipated and 

 an equal tendency is manifested to develop either the 

 seed or pollen parent phase, the ratio being 23:20. 

 It seems, therefore, that a better picture is u> be obtained 

 of these propensities it' those to sameness are included 

 with those to closeness. A cursory examinatii 

 figures of the first two columns of the latter table (the 

 other columns may be omitted to advantage and without 

 leading to misunderstanding), will render it e\ 

 that the agents and reagents fall into :i classes in accord- 



fvith then- propensity to and close- 



to tic Beed parent, samem - i the 



I 

 parental n p in pre'. . and that 



las •- merge into ea< both 



Polarization 



Iodine 



Safr&nin 



I emperature ol gelatinization 



< 'hloral hydrate 



< hromic acid 



Pyrogallic acid 



Nitric acid 



Sulphuric acid 



Potassium iodide 



Potassium sulphocyanate 

 Sodium sulphide 



i alcium nitrate 



Uranium nitrate 



Strontium nitrate 



Barium chloride 



Mercuric chloride 



i nitrate 



Sodium salicylate 



Potassium hydroxide 



C'tj]»ric cliloride 



Hydrochloric acid 



( ii Mian violet 



Potassium sulphide 



Sodiuru hydroxide . 



Cobalt nitrate 



With very few exceptions the rat" pear to be 

 such as to make the assignment quite definite. From 

 t hese groups it n ill be si most of the a ; 



nts (17 of the 2G) tend, most of them markedly, to 

 elicit the seed parent phase ; somewhat less than one-sixth 

 ( I of the 26), seldom markedly, tend ollen 



parent phase ; and the remaining less than one-fifth (5 of 

 i tend with about or equal propensity to elicit one 

 or the other parent-phase. P ral that have 



hem assigned to the firsl group, especially chloral hy- 

 drate, should be transferred to the last group, and other 

 redistribution made. 



1 1 seems from the foregoing data that the develop- 

 ment of the various parent-phases is dependent upoi 

 fundamental Eactors: <>ne. inherent properties of the 



i by virtue i h different starches exhibit with 



the saino agenl or n agent specific parent-phase reai : 

 one starch reacting the same as the seed parent, ai 

 the same as the pollen parent, another intermedial 



the two parents, etc., as shown in pn 

 and the other, inherent properties of th - and 



nts by virtue of which, ill a-- plas- 



ule, any parent-pl 'ed may I 



i d at will in any given starch. Inasmuch as there 

 are thus two factors which may tend in like or unlike 

 directions in the evolution of a parent-pht 



the greatest variations in these main:- must 



be expected in the reactions, both when th 

 starch reacting with var 



.'. ith various star. 1: 



