180 ANALYTIC SECT. XX. 
frightful activity of the genitals, which continued 
till within a short period of dissolution. M. Serres, 
in his work on Apoplexies, mentions an interest- 
ing case of a child that died of inflamed cere- 
bellum, of which priapism was the most remark- 
able symptom during the progress of the disease, 
ccccxLv. Wounds of the occiput sometimes 
induce impotence. 
ccccxivi. There is no cue by which the cause 
of these remote sympathies can. be explained ;, to 
detect their existence, is the pull boundary 
of research. 
ccccextvur The expansion of the penis is 
caused by augmentation of its vital force; its 
spongy substance no: sooner expands, than the 
pudic arteries discharge a greater quantity of 
blood into it; its heat is increased, the arteries 
throb, and the whole organ is rigidly enlarged. 
Erection of the penis has been ascribed to pressure 
upon its veins, which in fact exists, but which 
proceeds really from expansion of this organ 
itself, 

