id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
crl-12543	La Hood, Charles G.	Microfilm for the Library of Congress	1973	4	.pdf	application/pdf	2138	92	57	Negative microfilm exposed in the cameras is processed automatically in a custom-built machine capable of han- dling 100 feet of film a minute. The program was extended in 1962 to the filming of newspaper volumes dat- ing back to 1870, when sulfide paper was first used for newsprint.	cache/crl-12543.pdf	txt/crl-12543.txt