div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=further-studies-of-light-guideshtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Further Studies of Light Guides loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader037vdocumentsusreader037viewer2022090905613c8793a9aa48668d4a1d6chtml5thumbnails1jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imageimg data-url=further-studies-of-light-guideshtmlpage=2 data-page=2 class=ts-thumb lazyload alt=Page 2: Further Studies of Light Guides loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader037vdocumentsusreader037viewer2022090905613c8793a9aa48668d4a1d6chtml5thumbnails2jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=3Page 3button div class=ts-imageimg data-url=further-studies-of-light-guideshtmlpage=3 data-page=3 class=ts-thumb lazyload alt=Page 3: Further Studies of Light Guides loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader037vdocumentsusreader037viewer2022090905613c8793a9aa48668d4a1d6chtml5thumbnails3jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=4Page 4button div class=ts-imageimg data-url=further-studies-of-light-guideshtmlpage=4 data-page=4 class=ts-thumb lazyload alt=Page 4: Further Studies of Light Guides loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader037vdocumentsusreader037viewer2022090905613c8793a9aa48668d4a1d6chtml5thumbnails4jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=5Page 5button div class=ts-imageimg data-url=further-studies-of-light-guideshtmlpage=5 data-page=5 class=ts-thumb lazyload alt=Page 5: Further Studies of Light Guides loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader037vdocumentsusreader037viewer2022090905613c8793a9aa48668d4a1d6chtml5thumbnails5jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=6Page 6button div class=ts-imageimg data-url=further-studies-of-light-guideshtmlpage=6 data-page=6 class=ts-thumb lazyload alt=Page 6: Further Studies of Light Guides loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader037vdocumentsusreader037viewer2022090905613c8793a9aa48668d4a1d6chtml5thumbnails6jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=7Page 7button div class=ts-imageimg data-url=further-studies-of-light-guideshtmlpage=7 data-page=7 class=ts-thumb lazyload alt=Page 7: Further Studies of Light Guides loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader037vdocumentsusreader037viewer2022090905613c8793a9aa48668d4a1d6chtml5thumbnails7jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=8Page 8button div class=ts-imageimg data-url=further-studies-of-light-guideshtmlpage=8 data-page=8 class=ts-thumb lazyload alt=Page 8: Further Studies of Light Guides loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader037vdocumentsusreader037viewer2022090905613c8793a9aa48668d4a1d6chtml5thumbnails8jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=9Page 9button div class=ts-imageimg data-url=further-studies-of-light-guideshtmlpage=9 data-page=9 class=ts-thumb lazyload alt=Page 9: Further Studies of Light Guides loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader037vdocumentsusreader037viewer2022090905613c8793a9aa48668d4a1d6chtml5thumbnails9jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=10Page 10button div class=ts-imageimg data-url=further-studies-of-light-guideshtmlpage=10 data-page=10 class=ts-thumb lazyload alt=Page 10: Further Studies of Light Guides loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader037vdocumentsusreader037viewer2022090905613c8793a9aa48668d4a1d6chtml5thumbnails10jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=11Page 11button div class=ts-imageimg data-url=further-studies-of-light-guideshtmlpage=11 data-page=11 class=ts-thumb lazyload alt=Page 11: Further Studies of Light Guides loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader037vdocumentsusreader037viewer2022090905613c8793a9aa48668d4a1d6chtml5thumbnails11jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=12Page 12button div class=ts-imageimg data-url=further-studies-of-light-guideshtmlpage=12 data-page=12 class=ts-thumb lazyload alt=Page 12: Further Studies of Light Guides loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader037vdocumentsusreader037viewer2022090905613c8793a9aa48668d4a1d6chtml5thumbnails12jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=13Page 13button div class=ts-imageimg data-url=further-studies-of-light-guideshtmlpage=13 data-page=13 class=ts-thumb lazyload alt=Page 13: Further Studies of Light Guides loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader037vdocumentsusreader037viewer2022090905613c8793a9aa48668d4a1d6chtml5thumbnails13jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=14Page 14button div class=ts-imageimg data-url=further-studies-of-light-guideshtmlpage=14 data-page=14 class=ts-thumb lazyload alt=Page 14: Further Studies of Light Guides loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader037vdocumentsusreader037viewer2022090905613c8793a9aa48668d4a1d6chtml5thumbnails14jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=15Page 15button div class=ts-imageimg data-url=further-studies-of-light-guideshtmlpage=15 data-page=15 class=ts-thumb lazyload alt=Page 15: Further Studies of Light Guides loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader037vdocumentsusreader037viewer2022090905613c8793a9aa48668d4a1d6chtml5thumbnails15jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=16Page 16button div class=ts-imageimg data-url=further-studies-of-light-guideshtmlpage=16 data-page=16 class=ts-thumb lazyload alt=Page 16: Further Studies of Light Guides loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader037vdocumentsusreader037viewer2022090905613c8793a9aa48668d4a1d6chtml5thumbnails16jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=17Page 17button div class=ts-imageimg data-url=further-studies-of-light-guideshtmlpage=17 data-page=17 class=ts-thumb lazyload alt=Page 17: Further Studies of Light Guides loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader037vdocumentsusreader037viewer2022090905613c8793a9aa48668d4a1d6chtml5thumbnails17jpg width=140 height=200 divdiv