336 



LESSONS IN AGRICULTURE 



unjust," so does the dry weather come to both alike, and 

 the farmer, to whatever class he may belong, is more de- 

 pendent upon the state of the weather for success in his 

 business, than perhaps upon any other force. 



Weather reports. The Department of Agriculture, 

 through the Weather Service, has made provision for 



KEY TO COLORS 



BLACK 



2 3 



Weather service flaps. 



KEY "TO COLORS ->[]wrHTE ||RED (BLACK 



FIG. 102. 



Wind and storm signals. 

 UNITED STATES WEATHER SIGNALS 



jaily weather reports to all parts of the country. These 

 reports are sent out by rural telephones, by bulletins car- 

 ried by the rural mail service, by means of signal flags 

 of certain designs and colors, and by steam whistles 

 blown sufficiently strong to be heard some distance away. 

 The flags used for this purpose are as follows : 



No. 1. White flag indicates clear and fair weather. 



No. 2. Blue flag indicates rain or snow. 



