This article proposes a characterization of the double reed in quasistatic regimes. The nonlinear relation between the pressure drop, deltap, in the double reed and the volume flow crossing it, q, is measured for slow variations of these variables. The volume flow is determined from the pressure drop in a diaphragm replacing the instrument's bore. Measurements are compared to other experimental...

Sraffa advanced his critique of economic theory (Sraffa, 1960) based on the notion a production system that replicates itself. Prices associated with exchanges in such ought to be producers and workers would have necessary purchasing power. The original Sraffian schemes do not include possibility for take place through deferred means payments. We generalise this by introducing characterise doma...