Falstaff might have rendered more romance to the ton than would have Romeo's rickety ribs to the ounce.

render=present，perform。render romance=搞风流事

to the ton=to great a mount 在本句表示程度之高

to the ounce= to very small amout 在本句表示程度

than比较分句为倒装结构，还原正常语序为：

Falstaff might have rendered more romance to the ton than Romeo's rickety ribs would have rendered      to the ounce.

划线部分分别为主句的比较项和从句必须省略的比较对应项。