358 
the greater after the corn, because the plants are not much injured by 
frost. 
EFFECT OF VARIATIONS IN DATES OF SEEDING AND 
HARVESTING. 
The injurious effects of late frosts on early vegetables and on 
grains sown in the spring is generally annulled in part by a second 
sowing, so that the crop reports for the year do not show the full 
extent of the injury done to the plant by the climate. 
In a general comparison between the climate and the crops accu- 
racy would require that we know the date of last planting, but in the 
absence of this fundamental datum we are obliged to use the average 
dates between which the planting is done in any given State, and 
such dates are given in the following table and are assumed to refer 
to the dates of planting the seed which actually brought forth the 
subsequent harvest, whose yield per acre is given in the tables pub- 
lished by the statistician of the Department of Agriculture. 
These tables are also necessary in order to compute the thermal 
constants and to anticipate the dates of bloom and harvest. The 
following tables, for 1882 and 1889, as published in the Annual 
Reports of the Department of Agriculture (pp. 409 and 636, respec- 
tively), give the dates of seeding for wheat: 
1882. 1889. 
Rtate: Date of seeding. Rvornee Date of seeding. | Aver- 
L date of datoae 
From—| To— j|seeding.| From—| To— seeding. 
@onnecticut..22--0 ee eee Sept. 1 | Nov. 1 | Sept.25 | Sept. 1 | Oct. 25 | Sept. 25 
ING Wi MOY Kea once eee ree re sk eeete ness Aug. 15 | Oct. 30 | Sept.16 | Aug. 15 | Oct. 15 | Sept. 15 
ING Wid CPBCY 22e oe see see owe ss2s-besees= Aug. 28 | Nov. 10 | Sept.28 | Aug. 25 | Oct. 25 | Sept. 25 
Pennsylvaniays. 222. asta seas eons Aug. 20 | Oct. 20 | Sept.20 | Aug. 10 | Oct. 30} Sept.19 
Delaware: t2.62 oe 1 o-oo eet be teen noes Sept. 20 | Oct. 10 | Oct. 1) Sept.15 | Nov. 1] Oct. 10 
Marylandss sachets 4 ce ete Boe one Sept. 1| Dec. 1] Oct. 13 | Aug. 20 | Nov. 20] Oct. 13 
Virginia 22.) sooo eee he ozs eee ee Aug. 20 | Nov. 25 | Oct. 15 | Sept. 5 | Dec. 1! Oct. 19 
North Carolina a2. soe see es eee ee Sept. 1 | Jan. 10 | Oct. 29 | Sept. 1 | Dec. 15 | Nov. 5 
South'@arolinas-=)2--2----" Daas eae wt Ne Oct. 1| Jan. 1] Nov. 1) Oct. 11} Dec. 10} Nov. 18 
Georgia ee sae se eee er eee Sept. 1 | Jan. 10} Nov. 2 | Sept. 1 | Dec. 25 | Nov. 14 
Mla bam © = see sccc See setae seinen ees ..--do...| Dec. 20 | Nov. 3 | Sept.15 | Jan. 1{| Nov. 7 
IMISSISSIpPDIs.s2- oe os oe ee eee © 2 d0-24 || Dece Wila2=2d02e4|2=-=G0=22|" Deel s0s||INOvaEo 
Teouisiana 22 525-2222 aes oo es aoe 2-00 <= || ENOVE. 20 INOVs (oi Hose ccee oo ae eee ees|— = eee 
DOXA j22 oes sas he ae ne cea aeecee ...-do..-| Mar. 15 | Nov. ‘7 | Sept. 1| Feb. 1 | Nov. 6 
Arkansas = 225 2s20 22S ocsceesseseas eee =<. -d0)-2.| dan. 15)|/Oct: (26) |-2-=do=--| Jan) 1L0uONovem! 
Tennessee ...-..-------- So eskonstecsenocen Aug. 1] Dec. 15 | Oct. 15 |_...do-.-| Dec. 20 | Oct. 22 
Wrest: Virginia = 22s2 sa tS =~ cease Aug. 20 | Noy. 15 | Sept.30 |----do---| Nov. 15 | Oct. 2 
Kentucky)=22: 22--5+ -saUoseces aoe eee Aug. 25 | Dec. 20 | Oct. 7 |----do---; Dec. 10 | Oct. 12 
Ohige 2s Sees a ee Se ee hae ee Aug. 1 | Nov. 20 | Sept.20 | Aug. 25 | Nov. 15 | Sept. 24 
Michigan! 2.2- 222i. 2522 soe sane eee ee Aug. 20 | Nov. 15 | Sept.17 | Aug. 20 | Nov. 1 | Sept.15 
Indiana: 222-3258 Lito ee ees Aug. 15 |....do._.| Sept.19 |__..do-.-| Nov. 20 | Sept. 24 
MIN OIS! 225 eee oa ee eee ee cream Aug. 20 | Noy. 10 | Sept.20 | Aug. 25 | Nov. 13 | Sept. 23 
Missouri: 22.35 S25. en see eee ee eee Aug. 15 | Dec. 1 | Sept.25 | Aug. 15 |} Dec. 1 | Sept.29 
KANSAS Hos eee ate deter ee eeeee eee Aug. 1| Jan. 1 | Sept.23 -do ..-|----do---| Sept. 24 
California 34255222220. oc ea Se oe | See Bae | ee Sept. 1} May 1 | Dec. 27 
Oregon ici Scie ete ee eae ee |e Sept.15 | Apr. 1 | Nov. 25 
