Show small army of unpaid observers of weather thousands of men and women act AS unpaid co operative cooperative ope rothe observers of the united states weather bureau thanks to the services sen ices of these persons dilly dally weather records me are maintained tit at nearly places in this country and lit in many cases the ree ice olds ardi liae have been kept hardly a break for do 50 scars eam or more by an individual observer ol serer or by members of 0 lie hie same family these records aro are sent seat monthly mont lily to washington and serve ns as the raw material from which climatic statistics are prepared for nil all parts of the country the bureau supplies to each observer a iraln gauge a maximum thermometer for registering tile the highest temperature temper aturo of 0 the day it minimum thermometer which registers the lowest and a wooden thermometer and screen or shelter file observer obi eier reads ills his instruments once it day usually about sunset ant ani enters the readings in ills register leg lster together with ith a record recoil of various special weather lier events such as frosts thunderstorms stor ins tornadoes auroras and optical phenomena |