id	keyword
hindsight-3560	new
hindsight-3560	vol
hindsight-3560	history
hindsight-3560	work
hindsight-3560	pages
hindsight-3560	science
hindsight-3560	newton
hindsight-3560	scientific
hindsight-3560	york
hindsight-3560	time
hindsight-3560	issue
hindsight-3560	contact
hindsight-3560	franklin
hindsight-3560	hooke
hindsight-3560	years
hindsight-3560	lenses
hindsight-3560	life
hindsight-3560	london
hindsight-3560	michelson
hindsight-3560	young
hindsight-3560	spectacle