MUSA. 



735 



cent of the total starch in 15 minutes; in about 64 per 

 cent of the grains and 80 per cent of the total starch in 30 

 minutes ; in about 68 per cent of the grains and 86 per 

 cent of the total starch in 45 minutes; in about 72 per 

 cent of the grains and 90 per cent of the total starch 

 in 60 minutes. (Chart D 566.) 



The reaction with uranium nitrate begins in a few 

 grains in 15 seconds. Complete gelatinization occurs in 

 about 3 per cent of the entire number of grains and 8 

 per cent of the total starch in 1 minute; in about 37 

 per cent of the grains and 54 per cent of the total starch 

 in 3 minutes; in about 53 per cent of the grains and 73 

 per cent of the total starch in 5 minutes ; in about 64 per 

 cent of the grains and 83 per cent of the total starch in 

 15 minutes; in about 68 per cent of the grains and 87 

 per cent of the total starch in 30 minutes; in about 70 

 per cent of the grains and 93 per cent of the total starch 

 in 45 minutes; in about 75 per cent of the grains and 

 95 per cent of the total starch in 60 minutes. (Chart 

 D 567.) 



The reaction with strontium nitrate begins in a few 

 grains in 30 seconds. Complete gelatinization occurs in 

 about 5 per cent of the entire number of grains and 15 

 per cent of the total starch in 1 minute; in about 61 per 

 cent of the grains and 72 per cent of the total starch in 3 

 minutes; in about 65 per cent of the grains and 76 per 

 cent of the total starch in 5 minutes; in about 78 per 

 cent of the grains and 92 per cent of the total starch in 

 15 minutes; in about 84 per cent of the grains and 95 

 per cent of the total starch in 30 minutes; very little if 

 any further advance in 45 and 60 minutes, respectively. 

 (Chart D56S.) 



The reaction with cobalt nitrate begins in a few 

 grains in 1 minute. Complete golatinization occurs in 

 about 3 per cent of the entire number of grains and 10 

 per cent of the total starch in 5 minutes; in about 10 

 per cent of the grains and 21 per cent of the total starch 

 in 15 minutes ; in about 14 per cent of the grains and 30 

 per cent of the total starch in 30 minutes; in about 30 

 per cent of the grains and 40 per cent of the total starch 

 in 45 minutes; in about the same percentage of the 

 grains and 44 per cent of the total starch in 60 minutes. 

 (Chart D 569.) 



The hilum and lamella? are as distinct as in M. 

 gilletii. Gelatinization begins at the hilum and pro- 

 gresses according to the two methods seen in both parents. 

 That which is seen in a very large majority of the grains 

 is nearly the same as that seen in a somewhat smaller 

 majority of M. gilletii and is similar to that seen in a 

 minority of the grains of M. arnoldiana. The only 

 difference noted between M. gilletii and the hybrid is that 

 all the grains do not show granule formation around the 

 hilum, but a few gelatinize as described under M. arnol- 

 diana. In the second method, which is seen in very 



few grains, there are no differences between either parents 

 or hybrid. The gelatinized grains are as much swollen, 

 have as thick capsules, and are as much distorted, particu- 

 larly at the distal end, as in M. gilletii. In this reaction 

 M. hybrida shows qualitatively a closer relationship to 

 M. giletii than to M. anoldiana. 



The reaction with copper nitrate begins in a few 

 grains immediately. Complete gelatinization occurs in 

 about 1 per cent of the entire number of grains and 4 

 per cent of the total starch in 30 seconds ; in about 2 per 

 cent of the grains and 8 per cent of the total starch in 1 

 minute ; in about 39 per cent of the grains and 59 per cent 

 of the total starch in 5 minutes ; in about 66 per cent 

 of the grains and 88 per cent of the total starch in 15 

 minutes ; in about 66 per cent of the grains and 90 per 

 cent of the total starch in 30 minutes ; little if any further 

 advance in 45 and 60 minutes. (Chart D 570.) 



The reaction with cupric chloride begins in a few 

 grains in 15 seconds. Complete gelatinization occurs in 

 about 1 per cent of the entire number of grains and 5 

 per cent of the total starch in 1 minute; in about 25 per 

 cent of the grains and 50 per cent of the total starch in 

 3 minutes; in about 30 per cent of the grains and 55 

 per cent of the total starch in 5 minutes ; in about 40 per 

 cent of the grains and 70 per cent of the total starch in 

 15 minutes ; in about 50 per cent of the grains and 80 per 

 cent of the total starch in 30 minutes ; in about 55 per 

 cent of the grains and 82 per cent of the total starch in 

 45 minutes ; in about the same percentage of the grains 

 and 85 per cent of the total starch in 60 minutes. (Chart 

 D571.) 



The reaction with barium chloride begins in a few 

 grains in 30 seconds. Complete gelatinization occurs in 

 about 1 per cent of the entire number of grains and 5 per 

 cent of the total starch in 5 minutes; in about 21 per 

 cent of the grains and 26 per cent of the total starch in 

 15 minutes; in about 23 per cent of the grains and 40 

 per cent of the total starch in 30 minutes; little if any 

 further advance occurs in 45 and 60 minutes. (Chart 

 D572.) 



The reaction with mercuric chloride begins in a few 

 grains in 30 seconds. Complete gelatinization occurs in 

 less than 0.5 per cent of the entire number of grains and 

 3 per cent of the total starch in 1 minute ; in about 14 per 

 cent of the grains and 31 per cent of the total starch in 

 3 minutes ; in about 29 per cent of the grains and 48 per 

 cent of the total starch in 5 minutes ; in about 39 per cent 

 of the grains and 55 per cent of the total starch in 15 

 minutes ; in about 45 per cent of the grains and 62 per 

 cent of the total starch in 30 minutes ; in about 47 per 

 cent of the grains and 68 per cent of the total starch in 

 45 minutes; in about 57 per cent of the grains and 72 

 per cent of the total starch in 60 minutes. (Chart 

 D573.) 



