id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
crl-13657	Gwinn, Nancy E.	CLR and Preservation	1981-03-01	23	.pdf	application/pdf	15545	832	53	He continued to study what had happened to book papers from the fifteenth through the nineteenth centuries, and he began to look at the effects storage tempera- tures have on the permanence of paper. Although pollution does play a role (and in some areas , such as New York City, a critical one), Barrow identified manufacturing processes as the principal cause of paper decay ; in a later investigation of book papers manufactured from 1800 to 1899, he was able to trace historically the loss of strength in papers in a time line that matched the introduction by paper mills of alum sizing and the use of cheaper and shorter fibers.	cache/crl-13657.pdf	txt/crl-13657.txt