a head of glass a beneath annular horizontal plate 81 as shown glass b in molten glass stream 80 is positioned closer to spinner peripheral wall 64 than stream 78 and the b glass in stream 80 is intercepted by an annular horizontal plate 82 before it can reach the spinner bottom wall thus a build up or head of glass b is formed above horizontal plate 82 as shown as best shown in fig3 and 5 the spinner 60 is adapted with a series of vertical baffles 86 which are positioned along spinner peripheral wall 64 to divide that space into a series of generally vertically aligned compartments 88 positioned between horizontal plates 81 and 82 with plate 82 positioned on the top edges of baffles 86 and plate 81 positioned against the bottom edges of those baffles access to the compartments 88 is provided by a series of orifices 89 and 91 respectively on horizontal plates 81 and 82 as shown orifices 89 in plate 82 are spaced about the periphery of the plate to provide access into alternating ones of compartments 88 likewise orifices 91 are spaced about the periphery of plate 81 to provide access into the remaining ones of the compartments such that the a and b glasses are in alternating ones of the compartments while the spinner is illustrated as having one orifice 89 or 91 per compartment it will be recognized that a greater number of orifices per compartment may be provided respectively on plates 81 and 82 for example a plurality of orifices could be made along radial lines outwardly along plates 81 and 82 in alignment with compartments 88 in operation molten b glass from stream 80 drops onto horizontal plate 82 and is centrifuged.