Allgemeine Anatomie. Lehre von den Mischungs- und Formbestandtheilen des menschlichen Körpers.

Many of the histological discoveries of Henle are described in the above. He classified tissues histologically. In the section on Gefässnerven (pp. 510, 690) Henle demonstrated the presence of smooth muscle in the endothelial coat of small arteries. Digital facsimile from the Hathi Trust at this link.