Abstract: A portable anesthesia machine includes a vaporizer having a combinant chamber for containing a liquid anesthetic agent and a pair of diluent stems extending therein for delivering a carrier gas thereinto and providing a vaporized anesthesia agent therefrom, with a generally arcuately shaped, slotted, baffle covering an orifice in each of the diluent stems and a cotton wick extending along the height of each of a pair of carrier stems. A calibrated knob and piston/cylinder assembly controls flow of carrier gas and diluent gas into and out of the combinant chamber. A flow control manifold allows the connection of a multiple number of carrier gases and calibrated flow of any selected carrier gas into the vaporizer. A well fill port provides a convenient point for filling or draining the combinant chamber.