Bulletin . ere K > -^ Simonis obtains his re-fractory quotient by the formula E. —T -f+GO, where K=% kaolinqur^% quartzf--=%. feldspar. *Sprech,saal, Vol. 40, Xos. 29 and 30. 16 THE INFLUENCE OF FLUXES AND NON-FLUXES UPON THE CHANGE For silicious bodies in which qu K < - 3 the formula employe is 3^_ KR. ^ f -f 60. 2 The number CO is added to prevent negative values of the refractory quotient are translated intocone temperatures by the following table: Refractory quotient . .Melting point in quotient .. ]Melting point in cones || 17-5
Bulletin . ere K > -^ Simonis obtains his re-fractory quotient by the formula E. —T -f+GO, where K=% kaolinqur^% quartzf--=%. feldspar. *Sprech,saal, Vol. 40, Xos. 29 and 30. 16 THE INFLUENCE OF FLUXES AND NON-FLUXES UPON THE CHANGE For silicious bodies in which qu K < - 3 the formula employe is 3^_ KR. ^ f -f 60. 2 The number CO is added to prevent negative values of the refractory quotient are translated intocone temperatures by the following table: Refractory quotient . .Melting point in quotient .. ]Melting point in cones || 17-5 33-7 39-2 330 34 P From the consideration of the Simonis calculation itis evident that feldspar plays the role of a neutral flux. With regard to the fusion process of triclinic feldsparswe have accurate data referring to artificial spars,* whichhad the following composition:. We have here evidently mixtures of albite and anor-thite, and on fusing a series of these mixtures it was foundthat they proved to be a series of solid solutions whose *Day and Allen. The Isomorphism and Thermal Properties of theFeldspars, Carnegie Inst., 1905. IN THE POROSITY AND THE SPECIFIC GRAVITY OF SOME
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