div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imagea href=https:reader043vdocumentssitereader043viewer2022020523575068911a28ab0f07b0c245html5page1jpg target=_blank img data-url=the-nagel-anomaloscope-and-seasonal-variation-of-colour-visionhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: The Nagel anomaloscope and seasonal variation of colour vision loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader043vdocumentssitereader043viewer2022020523575068911a28ab0f07b0c245html5thumbnails1jpg width=140 height=200 adivp© 1993 Nature Publishing Grouppdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imagea href=https:reader043vdocumentssitereader043viewer2022020523575068911a28ab0f07b0c245html5page2jpg target=_blank img data-url=the-nagel-anomaloscope-and-seasonal-variation-of-colour-visionhtmlpage=2 data-page=2 class=ts-thumb lazyload alt=Page 2: The Nagel anomaloscope and seasonal variation of colour vision loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader043vdocumentssitereader043viewer2022020523575068911a28ab0f07b0c245html5thumbnails2jpg width=140 height=200 adivp© 1993 Nature Publishing Grouppdivdiv class=ts-pagebutton class=gotoPage data-page=3Page 3button div class=ts-imagea href=https:reader043vdocumentssitereader043viewer2022020523575068911a28ab0f07b0c245html5page3jpg target=_blank img data-url=the-nagel-anomaloscope-and-seasonal-variation-of-colour-visionhtmlpage=3 data-page=3 class=ts-thumb lazyload alt=Page 3: The Nagel anomaloscope and seasonal variation of colour vision loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader043vdocumentssitereader043viewer2022020523575068911a28ab0f07b0c245html5thumbnails3jpg width=140 height=200 adivp© 1993 Nature Publishing Grouppdivdiv class=ts-pagebutton class=gotoPage data-page=4Page 4button div class=ts-imagea href=https:reader043vdocumentssitereader043viewer2022020523575068911a28ab0f07b0c245html5page4jpg target=_blank img data-url=the-nagel-anomaloscope-and-seasonal-variation-of-colour-visionhtmlpage=4 data-page=4 class=ts-thumb lazyload alt=Page 4: The Nagel anomaloscope and seasonal variation of colour vision loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader043vdocumentssitereader043viewer2022020523575068911a28ab0f07b0c245html5thumbnails4jpg width=140 height=200 adivp© 1993 Nature Publishing Grouppdiv