centre of a quadric

acceleration amplitude all geared clutch chemical cloud experiment cigar-box cedar cockneys dasyantha encephalo-rrhagia foreslopes HVDC converter substation intromittant organ Masset's tests rate of slaking re-arcing rough-field takeoff stationary Schrdinger equation stomates sulci glotaeus throbbing aorta tomfoolery Vakhanskiy Khr.(Vākhān Selseleh-ye Kūh-e)