248 
of their growth. The tables of statistics of the climate and the 
crops, or the corresponding graphic diagrams, allow us to take exact 
account of the features of the past years and to approximately com- 
pare these characteristics with the agricultural features of the cur- 
rent year. Let us compare among themselves the five crops for the 
years from 1873 to 1877. Of these five years, 1873 gave a poor crop. _ 
On the contrary, 1874 gave a very good crop, both as to quantity and 
quality. The crop of 1875 attained an average as to quantity, but 
the quality of the grain was below the average. Notwithstanding 
the great irregularities of 1876 it gave us a good average as to quan- 
tity and excellent grain as to quality. In 1877, notwithstanding a 
great development of straw or stalks, the crop of grain was below 
the average as to quantity and quality; therefore, as regards their 
crops of grain, these years can be classed in the following decreasing 
order: 1874, 1876, 1875, 1877, 1873. 
We will compare these harvests with the following meteorological 
tables for these years, as based on observations at Montsouris: 
MONTHLY RAINFALL. 
Month. 1872-73. | 1873-74. | 1874-75. | 1875-76. | 1876-77. 
mm. mm, mn. } mm, mm. 
O@ctober.s fo sse2cee se este ae oe eee eee eee ee 66.9 | 65.2 51.0 76.9 29.2 
INOVEMIDET Sees soe eae one ae ees eee eee es 128.1 | 36.5 44,2 75.4 51.0 
DECOM CT. oe oes ee ae ee oh ee ee 84.6 | 6.0 81.8 22. 4 34.8 
PANU cee eceeee oss eee ee ee eee No jos 31.3. 23.1 63.2 | 9.1 42.2 
Mapua yee teste abened ate me ime ee AEs 59.1 17.5 10.9 57.8 42.9 
MaiiGhvses oe ate uonceetie ace fae cee eee 40.4, 11.4 8.6 62.7 70.5 
INGA EUE pigs REN Ore A IRS WA ees bt aE 44.5 | 16.1 10.1 24.3 55.9 
INCA gees Sm Oe Ree ses Oe ena Ae Sete bey ab EC eS 45.2 36.6 24.6 14.3 69.5 
ATT ae Se ee aR ee. ori at, 137.9 47.8 82.0 70.6 66.7 
SRV he len ee ee eee ee Met orn een M ES, Eee | 38.8 54.5 82.1] 24.6 57.7 
PATIOS hte ee eee tn Ane Lene eo ohana ah ete 42.7 | 23.1 vom 72.3 36.7 
Septemberscse assesses cee te. Ph hee 53.6 65.1 32.8 65.3 50.1 
MONTHLY EVAPORATIONS, AS MEASURED BY THE PICHE EVAPORIMETER. 
mm. mm. mm. mm. mm. 
Octo bers: iss 55-2 ae ee = eee ee ee ees 58.2 52.1 47.1 26.8 39.3 
INOVeMIbeh sSac6e see oa ae ee ee Oe 55. 4 52.9 34.1 | 40.8 33.1 
December 2 2:08:32 as Dae A eee es 48.3 2.4 32.0 11.3 58.9 
J ATMUBINY (os sae ae eee ee Se ee eee te eee | ee 36.8 34.0 8.0 53.3 
Me bMUaARY sees SL ek Wafers se a ae PEAS Chee eee ay eee 50.5 25.0 31.5 40.5 
Marchi ts .stevenac, = rope ue 30s be alban eee ieee nee 85.5 | 80.6 84.3 63.3 46.5 
PATI eee ns Seen oe ee ee pe ene See 5 ee A 110.5 99.0 135.0 | 107.2 90.5 
Mayes fase oe as PO Se ee eee eee 121.7 TLONOF) a 5S0 | 147.5 90.8 
SPURT O Pareto ee i fo Ae cee aN et 97.4 142.8 92.3 115.8 120.7 
alygeemerrn es a ee nk es eek ne see ae ee iat ee 121.7 149.8 81.5 | 144.2 99. 2 
PANUSUS Gere ete coo cece gee na a oe 129.7 130.6 84.7 123.7 93.8 
September sas4--secao = 2 ee eee 72.4 78.3 65.6 44.2 63.0 
