Climatography of the Salt River Valley region of Arizona, the land of health and sunshine . States, or east ofthe one hundred and fifth meridian, ranges from 55° to 75°.West of the one hundred and fifth meridian the range isfrom 50° to 65°. Chart II has been prepared to illustrate the extreme dif-ferences that prevail in midsummer, the 8 , seventy-fifth meridian time observation of July having been used.(8 p. m., seventy-fifth meridian, corresponds to 7 cen-tral, 6 mountain, and 5 Pacific time.) There isan objection to the use of synchronous time in depictingclimatic element
Climatography of the Salt River Valley region of Arizona, the land of health and sunshine . States, or east ofthe one hundred and fifth meridian, ranges from 55° to 75°.West of the one hundred and fifth meridian the range isfrom 50° to 65°. Chart II has been prepared to illustrate the extreme dif-ferences that prevail in midsummer, the 8 , seventy-fifth meridian time observation of July having been used.(8 p. m., seventy-fifth meridian, corresponds to 7 cen-tral, 6 mountain, and 5 Pacific time.) There isan objection to the use of synchronous time in depictingclimatic elements that have a marked diurnal taken at the same moment of local mean timeshould be used whenever possible, but the exigencies of aservice instituted for the purpose of forecasting weatherchanges demand the use of synchronous time. As regardsthe data of this chart (II), it may be urged with proprietythat a comparison of thermometric readings made at thesame moment of time from the Atlantic to the Pacific, ismisleading, since an accurate estimate can not be made of. 47 the amount of increase of temperature for western stationsdue to diurnal influences alone, and it was mainly with aview of illustrating this fact that the chart was prepared. The thermometer readings on the Atlantic seaboard aremade near the hour of S , local mean time; those onthe California coast are made near 5 , local mean , the Pacific Coast temperatures are considerablyhigher than those on the other side of the continent, threehours later in the afternoon. The contrast between thetwo sides of the country is plainly shown by the black linesof equal actual temperature on Chart II, and it will also beobserved that the Southwest is the warmest part of theUnited States. The lines of equal sensible heart, on the other hand,show an entirely different condition as regards the locationof greatest heat. The arid region is now the coolest partof the United States, judged from
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherchicagorrdonnelley
