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Mike [Lynch], 
 
You are correct.  The wording in the IEA paper is confusing and can  
lead one to believe that it was Hermann.  Apparently Hermann was the  
first to argue for the generality of upward-sloping supply curves that  
then led to (Streissler, IEA, p. 13):   
 
"But there was also one further consequence of Hermann's thought.    
In the fourth edition of his theory text-book, and ever after, Rau in an  
appendix (Rau 1841, p. 525-527) presented an explicitly argued  
demand curve and a demand and supply diagram.  It was not the first  
in the history of economic thought: Cournot (1838) had preceded him  
by three years.  But it is the first with price on the vertical and quantity  
on the horizontal axis: the Marshallian demand curve is born!"   
 
I apologize for my careless reading and thus my misleading of those on  
this list.  It was Rau, not Hermann.   
 
Barkley Rosser 
 
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