and one portable drier were m mailed for long hay. 13 natural air systems and 11 portable driers were installed for baled hay. Oth ers included chopped hay. corn, gram, and or combination in da 11alions. Of Die total 40 were natural ajr systems. 22 were por table crop driers. I. S. POPULATION Almost half of the population of the United States lives in 157 urbanized areas, which contain less than five per cent of the land area of the country. The popula tion per square mile of these ur banized areas is 5.438. while the average density outside the ur banized areas is 27.5 persons per I - UJh ; ’ Uii]P

56.9%