101- 
Sunshine and climate of Winnipeg—Continued. 
| Average duration ee aoe i hour in percentage Temperature. 
Month (1887). yl Ey RSS Ge DEE 
1 Bee p.m.|3 p.m.|4p.m.j5p.m.6p. m.7 el p.m. santa | baeeg |Mean. 
—— = = | - = | 
| | | | Sy yore | vem: 
JANUALY 225 22s 63 | 54 60 31 0 |- le 23.2 | —42.7 | —14.5 
February ..______- 70| 66] 64] 49| 20 a eae a ea 24.8 | —38.7 | — 8.0 
Meany rn sy 28028: bo) 08.) By |) © oF 48 8 Oieees 43.0 | —36.5 | 11.7 
Pp rile te ar 2 63 | 62 64 59 49| 35 ‘1S yeeyeers (Ce = CMON BYE: 
a ee | se}. s7| 41| 47] 49| 53/ 41] 5| 90.6] 2.0] 57.2 
Ait = ee ee | 84) %%8 69 59| 67| 63!| 48] 18| 88.0| 33.3] 64.6 
Ti Aa | 76| | 64| 1) 68) 59| 2] 98.2) 39.0] 66.5 
eiueuspe ee 70| 70/ v1| vi] 6o| 58/ 30| 5| 88.0) 333) 61.0 
September ___...___- | 76| 5 72 70 38 | 10 | Fi |e 83.8 | 23.2] 53.8 
Octoher== ae. | 60 62 57 44 18 | Ban ere | 2 ape ee 64.0 | — 2.8 32.4 
November ===--- --_- Low Bo 49 48 51 TAPS eee al | eeerener eee ee 58.6 | —31.4 | 17.4 
December __-...__--- | 54 | 55 44 23) | eee: | Peete | eel aa! es code 38.0 | —41.7 | — 0.3 
| 
In the above table the records of sunshine are, of course, given by 
. the self-registering method and relate to duration of visibility of sun 
at the station, while the cloudiness is the average of the observer’s 
estimates of area of sky covered. 
TOTAL POSSIBLE DURATION OF SUNSHINE BY DECADES. 
Tables showing the times of sunrise and sunset, or the resulting 
length of the day, are given is publications accessible to American 
readers, as follows: Meech, 1855, pages 57, 58, calculated especially 
for the year 1853; Schott, 1876, pages 117-119, computed for an aver- 
age year and for the actual sunrise and sunset and for each degree of 
latitude; the Smithsonian Meteorological and Physical Tables, 
fourth edition, 1884, give a very convenient table on pages 711-720, 
by Prof. W. Libbey, computed with the declinations for Greenwich 
mean noon for 1862; elaborate general tables are given in the Inter- 
national Meteorological Tables, Paris, 1890, but they are not so conve- 
nient for our use as the Smithsonian tables or those of Schott. 
By means of these tables of sunrise and sunset I have computed 
the accompanying table, showing the sum total of the possible sunshine 
expressed in hours from the beginning of January up to any date in 
a common year or a leap year.*. From this table has been made up 
the column of maximum sunshine in the tables of meteorological 
results for 1879 at twenty stations in the United States as given in 
Section II for comparison with the crops of that year, as reported in 
the United States census for 1880.” In the absence ora any other data 
aThe annual sums he meiner 31 in the table are anon. one- vthird to one- 
half per cent smaller than the figures given in the Weather Bureau table of 
1905. 
» All these manuscript statistical tables are omitted in the present edition. 
