336 
in 430 hours at a temperature which was between 37° and 42°, averag- 
ing above 40° F., while the Waushakum variety required 460 hours 
at the same temperature. 
Sturtevant calculates the sum total of temperatures by three meth- 
ods, a comparison of which is instructive. His results are in the 
following table: 
Thermal constants for maize at Geneva, N. Y., from germination to blooming. 
Sums of 
all posi- 
suet || ae 
Sue OF = tive miedo of 
Variety and subyariety. daily air dative vere 
eae ~ | temper- | air, and 
‘| atures, | soil at 1 
less50° F.| foot 
depth, 
less 50° F. 
Sweet corn: oH 2 18h SIH, 
Crosby siiarly. 2 5s2 22-5 2 ee tees ee ee ae ee 3,595 845 937. 
Daily Dutton 22.2 Se oe es oe Se ee oe ee eee 3,181 756 859 
Hey ptian as oa LN San ee ee ee eee Soe ee Sane 4, 342 1,042 1,132 
Stowell's byvergroen’= + 2-52 ele ae ee eae eee ae | 4,400 1,050 1,147 
Flint corn: 
Morty Days. ese 5 nae aoe ee a ee eee 3, 328 803 854 
King Philipt iio tc ee tate ce ee ee kaths 250 Fe) ee eee ee eee 3, 751 901 965 
Rural Thoroughbred: 22) ee ares eee ee ee a en ee 4, 668 1,118 1,210 
Weausha kum 260.5 Seco ee es ee eee Se eee 3,693 | 893 956 
Dent corn: 
Adams Harlys ssirki. cate kY eee Os eal” 2s ee, seve aie ie eee 3,589 839 978 
BONGO Meee ete oe eee Ae ees Se ape ee Ree ga ne a ee 4,187 1,012 1,086 
IBIOUM CSUR TOLL Ge oe tesserae oy ee eae ore ae 4,737 1,162 1,235 
Chester Counts Mami 0 Gh= sae = ae eee ee ee eee eee ee 5,192 1,342 1,319 
Sibley7sse ride) o Loh e) INO rs til eee ee 3,818 943 987 
The dates were: Corn planted May 16, 1888, and May 19, 1884; sprouted May 28, 
1883, and May 26, 1884; bloomed July 16 to August 8, 1883, and July 16 to August 26, 
1884. 
Thermal constants for peas from sprouting to maturity at Geneva, N. Y. 
| Sums of 
| Sums of alt posi- 
all posi- ive 
Sas ot tive |meansof 
Vari a eet,| mean | air and 
ariety. eee oe | daily air soil tem- 
bien temper- |peratures 
‘| atures, | at 1 foot 
less 44° F.| depth, 
less 44° F. 
oF. O16, Hie 
FAN OTICAT VON GEGT a= sem eee aan Ce see ee ee ee 3,516 1,150 1, 236 
Championiol ng land 222-32 ae ee ee ee eee ee 4,516 oud 1,506 
Kentishin vita. £ 5 ee ee oe a ee meee 3, 674 1,176 1,501 
McLean’ s7Adyance® 22h Pe ee ee ar ce og 4,515 1,376 1,520 
Premium! Gem ee oe eso oes Se ae ee ele reo ee eee 3,836 1,152 1, 250 
Telephony sx 22s gests oot oo ee ee ee 4,576 1, 408 1,524 
Peas planted April 21 and May 12, 1883; April 28, 1884; ripened July 10 to August 
6, 1883; July 2 to 28, 1884. 
