id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
hindsight-4067	Editors, Hindsight	Vol 32, No 1 (2001)	2001	8	.pdf	application/pdf	3515	191	62	Albertotti, writing atthe end of the 191h century, also describes concave mirror systems similar to those described by della Porta - in fact he advocates their use. The first clear mention of mirror systems is included in the works of Seneca, the Younger, who lived in Rome at roughly the time of Christ.	cache/hindsight-4067.pdf	txt/hindsight-4067.txt