A town index for this directory begins on image 681: http://genealogyindexer.org/view/190713Leuchs19b/681. The numbers next to the town names are the page numbers, to which you should add 20 to get approximately the corresponding image number. You can jump to image number X with the URL http://genealogyindexer.org/view/190713Leuchs19b/X. Alternatively, you can often find a town's section by using the town's name as your search term.
Abbreviations and symbols are explained on image 7: http://genealogyindexer.org/view/190713Leuchs19b/7.
Please note that this directory is available thanks to an anonymous donor who provided Genealogy Indexer with the images.