On the Property Belonging to Charcoal and Plumbago in Fine Plates and Particles of Transmitting Light

air-pump alcohol anatomists anatomy angle apparent magnitude aqueous humour axis of vision BELL's binocular vision boiling cameo caoutchouc centre of visible charcoal cholesterine coalesce colour cone cork corresponding points crystalline lens D'ALEMBERT described discovery dissimilar pictures distance distilled water distinct vision distinctly exhausted receiver experiment eyeball fibres figure filaments fluid frustum functions globules grilse Hence images intaglio lacteals law of visible left eye light lines of visible luminous magnitude marked microscope minute monocular motion Musca Muscæ nearer nerves object observed obtained optic axes owing particles phenomena pith plane plumbago portion pyramid refracted retina right eye river river Shin salmon seen sensation shew Sir CHARLES BELL smolts solid spawned specific gravity specimen spermaceti spinal stearine substance supposed surface Surgeons temperature tion transmitted transparent true visible direction visible point vitreous humour volitantes weighing WHEATSTONE