Show PLATE FLATE GLASS gnass in ti the I 1 e making of or liate alte glass tha the rit nit mate oate material erial rial used cons consists 5 ts of fine white sand soda ash lime and arsenic occasion occasionally aly manganese borix bor ix ac scare are add adad d when this mixture is prepared athis it is put into pots for about eight boars hours and wl when en melted an instrument somewhat reb res ni bing ing a long iong handled scoop is inserted through au an aperture over one of the doors of tile the furnace and the tha scum is removed the material mate rial is finally taken and placed upon a casting table the molten motten mass abor afi r it falls faila upon the tha tale and the tha p t is swu swung ng away is next compress ol intoe alte by a iaone lione ponderous erous roller of cast iron and whdeh while sti I 1 hot and emitting constant sparks from is entire sur sulfice fice immedi abely atti alti attl alt i is a nt consi sidney to be shoved on to the tile plaster 1 table tabie wh ch cli is th then in wheeled to the entra antra entrance nce oce of an oen aea oi 1 en put in the 0 oven ven sealed up and the process of annealing which lasts lasta two or thee days is commenced thia con consist sisti la in subjecting tile the plates to a heat gradually d decreasing in intensity until they are entirely cooled upon boing taken out they uru arc cao cat to the ill lii proper ax x |