Digital facsimile from Google Books at this link.

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His was, more than any other person, responsible for the introduction of the microtome, although Ranvier and other French people had earlier employed microtomes of simpler types.

This is generally considered the first clear statement that nerve cells in the brain might be independent units rather than forming an anastomotic network—as Gerlach, Golgi, and most others believed—although there are earlier hints of this from a variety of sources.  His’s conclusion was based on embryological observations in the spinal cord, suggesting that axons arise from nerve cell bodies (one per nerve cell), followed later by dendrites, and that any fusion of processes, if they occur at all, must be a secondary event. (Larry W. Swanson).

His described the atrioventricular bundle which was later named after him. English translation in F. A. Willius and T. E. Keys, Cardiac classics, 1941, p. 695.

His was largely responsible for the Basle Nomina Anatomica, the first attempt to produce a standard anatomical nomenclature. English translation by L.F. Barker, 1907.

His encountered a form of “trench fever” in Volhynia, Russia, and named it after that district.