The first book on the brain in the English language, including the first account of the circular venous sinus which Ridley names, and the first English account of a pineal tumor.  In it Ridley gives the first account of the circular venous sinus which he names. He also gives the first English account of a pineal tumour" (Russell).  The copperplates were engraved by van der Gucht from drawings by William Cowper.