el. tel 
124 : ; [ ASSEMBLY 
Pop and Soft 
Degrees. Dent corns. Flint corns. corns. Sweet corns. 
45 to 45d.... 3 3 3 ae 
45$ to 46 .... 2 ; 2 2 2 
ABS 10 46d cs eel setts 19 22 
AGi to 47.22 10 17 24 26 
Biri to aden KOLA. 26 98 44 
Ato ashes hb o7 30 43 
43. t0:484.... 23 29 29 4] 
Bea to49 2, - 4 BA 37 37 47 
49 to 494.... 7 10 10 13 
494 to 50 .... 10 10 10 10 
50 to 503.... 8 8 8 9 
503 to 503.... 3 3 3 3 
Our experiments, in concluding, show that:, 1st, all the kernels 
of an ear do not germinate with equal ease or with the same incre- 
ment of temperature; 2d, that there is a difference in the time 
and temperature required between some of the agricultural species 
of maize; 3d, that the Dent corns germinated at a temperature of 
47.6° or slightly below; Flints at a-temperature of 47.8° or slightly. 
below; Pops and Softs ditto; while Sweets required 48.5° or 
slightly below; 4th, that the increment of temperature required in 
our trials was far greater for the Sweets than for the other agricul- 
tural species. 3 
A Srupy or Maize. 
In presenting our experiments with maize varieties, we will com- 
mence with tables representing such facts as admit of tabular form. ° 
Four hills of a kind were planted, in single rows, in order as 
numbered and catalogued. The blooming and silking records are 
those of the first plant to bloom or silk in each hill. The number 
of ears include only those that were sound. It may be remarked 
that rarely are so good ears produced in these small plantings, as 
when the planting is on a larger scale, as there is apt to be a defi- 
ciency in the variety pollen, and hence omission of kernels on the 
ears. In most cases, however, some good ears were produced, often 
many, and in a general view corresponded with the type of the 
variety planted. Attention is especially called to the variation in 
the periods of first bloom in the different hills of a variety. It 
seemed impossible to note the last bloom, but often as much varia- 
tion was noticed between the blooming of the plants in a hill as 
existed between different hills, and thus the period of pollen flow 
was extended over along interval. The same remark applies to the 
silking, and thus we can accouut for hybridization in crop between 
varieties whose bloom are not shown to be synchronous by the 
record. 
The names used are those which came with the seed, except as to 
hybrids of station growth. We have given dates of edible matu- 
rity even in field corns, as offering a stage for comparison of growth. 
The planting was May 19. 
