Paris: Chez Rapilly, Libraire, 1828-1829. 6 volumes. First Edition. With all the half-titles, and folding chart. 8vo,, bound in three-quarter green morocco over marbled boards, the spines with raised bands gilt stopped, lettered in gilt in two compartments, marbled end-leaves, top edge gilt. A very good copy with some light rubbing, confined primarily to the spine panels which have, as is usual with green morocco, mellowed to honey, internally clean and well preserved. FIRST EDITION OF THIS IMPORTANT WORK. Say's most famous work, and one of the most influential economic treatises of the 19th Century. Also, the most complete edition of Say's Traite, published in 1803, and delivered as lectures at the Conservatoire Des Arts Et Metiers. Say argued in favour of competition, free trade, and the lifting of restraints and regulations on business. He is best known for Say's Law, also known as the law of markets, which he popularized. The Scottish classical economist James…