Show manufacture OF GLASS ass A staffordshire manufacturer england lifts has made some improvements prove ments in the manufacture of glass which he has patented these consist in the application of anthracite coal in the manufacture the fuel hitherto used has been for the most moat part bituminous coal but this evolves so much smoke as to produce an injurious effect on the color of the glass manufactured and it is with a view to prevent or obviate such injurious consequences that the present improvements have 0 been devised the furnaces for burning this description of fuel require to be very little altered from the construction at present in use the fuel will be supplied by feed aperture aper turps s and suitable pipes must be added for introducing a blast of air which blast may be created by fan or other blowers the air may be heated by interposing heaters between the blower and the furnace but the heating is not considered necessary ces sary the beds of the furnaces should be closed which may be done by gloaming learning over the grate bars or by introducing a movable plate beneath them arid and the ash pit should be made deep enough to contain a considerable quantity of ashes the pots are of the usual construction and they should be placed on sieges elevated above the orifices of the blowing pipe to an extent that will admit of the flame being directed against the lower as well as the upper parts of the same |