Pa far 
Thus Old Colony Sweet, obtained from Parker and Gannett in 
1884 was entirely different from the Old Colony Sweet of Breck ; so 
also Egyptian Sweet of Ferry from Egyptian Sweet of Gregory, and 
Egyptian of 1883 and Squantum of 1883 were also different from 
the varieties grown under the like name in 1884. In our later 
studies we described and arranged the sweet corn in a series of 
articles, which appeared in 1884, and, accepting these descriptions 
as accurate, our 1883 growing of sweet corn was defective in nam- 
ing; thus Squantum was not this variety at all; Egyptian was the 
Hight-rowed Early, of a late type, and Ne Plus Ultra was grown 
* from seed of Station growth, and undoubtedly hybridized. It is 
very probable. that other discrepancies of like character occurred, 
but which our knowledge of varieties did not enable us to recognize, 
and this may account in part for difference in results in the com- 
parison of the two years’ trials. 
The data we possess for our present study is that furnished by 
127 varieties growing together in one plat in 1883, and 134 varie- 
ties grown in like manner in 1884, the yields carefully studied ear 
by ear, and the observations noted at the time, and afterward veri- 
fied by sample ears selected for the purpose, and retained for further 
examination. 
Under our circumstances of planting, dees the pollen freely cireu- 
late throughout the plat? This is an important question for decision 
as upon it depends the value of negative observations. The flow 
of pollen is very uneven, both in commencement and continuance, 
one plant frequently blooming even eleven or twelve days before 
another plant of the same row, or even hill, and the duration of the 
bloom often extended, in some cases, far more than in others. Itis 
probable, therefore, that with the few exceptions of the very early 
and very late sorts, there might have been a free commingling of 
the pollen. That this was actually the case was evidenced by the 
effects produced by the test or *‘ witness ”’ varieties planted for this 
purpose. The Black Mexican Sweet, and the Blue Mandan or 
Squaw varieties furnish a color of kernel so distinct that its presence 
mixed with kernels of other corns can be safely recognized ; and 
this color and this kernel were found generally in the crops, irre- 
spective of distance from the “ witness” plants. We must there- 
fore believe that some plant of almost every variety had the oppor- 
tunity to cross with each other variety, if there was no resistance. 
There are two kinds of hybridization to be considered in the study 
of maize. One, the current fertilization, whereby the influence is 
shown by change of kernel, either in color or structure, the same 
year. The second is the hybridization which only shows itself in 
the crop grown from the crossed kernels, and which does not appear 
in the current crop. These two kinds must receive attention sepa- 
rately. 
We will divide our material into two divisions ; the one the ears 
grown from seed obtained from seedsmen, or presumably a named 
variety; the other, the seed obtained from hybridized samples, or 
