Show small army anny of unpaid observers of weather Thou thousands sandi of men and all women net act as unpaid operative cooperative co observers of the lie united states weather went lier bureau thanks to the servI services cei of these persons dally daily weather records tire lire main at nearly places in tills this country and in ili many cases therea llie the rec orda have been kept with hardly a break bleak for BO 50 years or more by an in individual observer or by members of ill lie e same family faintly these records are se sent nt monthly to washington and serve is as the raw material from roin which climatic III it abic statistics are prepared f for nil parts of the country the bureau supplies to ench each ob observer seiver a maln gauge a maximum thermometer for registering the highest temperature of the day a minimum ter which registers the lowest and a wooden thermometer and screen or shelter the observer reads ills his instruments once a da day y usually about sunset and enters tile the readings in tits his register together with a record of various special weather events such as frosts thunderstorms tornadoes auroras and optical phenomena |