id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
work_6pbqkuxuavhsjcc4ncg6kqk53m	John R. Levene	Benjamin Franklin, F. R. S., Sir Joshua Reynolds, F. R. S., P. R. A., Benjamin West, P. R. A. and the invention of bifocals	1972		.pdf	text/html	832	167	66	and the invention of bifocals | Notes and Records of the Royal Society of London If the address matches an existing account you will receive an email with instructions to reset your password. If the address matches an existing account you will receive an email with instructions to retrieve your username Royal Society Open Science Quick Search anywhereEnter words, phrases, DOI, keywords, authors, etc... Published:01 August 1972https://doi.org/10.1098/rsnr.1972.0015 The aim of this paper is to review the evidence and to examine the principal roles, interrelationships and influences, of three persons involved in the early history of bifocals, namely Benjamin Franklin, and two famous artists, Sir Joshua Reynolds and Benjamin West. Please contact the Royal Society if you find an error you would like to see corrected. Sign in for Fellows of the Royal Society Scanned images copyright © 2017, Royal Society ROYAL SOCIETY PUBLISHING ROYAL SOCIETY PUBLISHING Copyright © 2021 The Royal Society	./cache/work_6pbqkuxuavhsjcc4ncg6kqk53m.pdf	./txt/work_6pbqkuxuavhsjcc4ncg6kqk53m.txt