Show making holes in glass S strong rong glass plates are bored through b of rotary brass tub tubes of the I cesca means le diameter in t r w which are filled with water dura hartas boring to the water la Is added finely p dered 11 emery 1 thinner glass glasa may be b pe p for borated 1 with b boles 01 I 1 in a an u easier manner pressing dressing a disk of wet clay upon the c K and making a hole through the clay of f that the glass is 1 lai laid ld adze required so 0 o ai a i 81 molten molt en lead Is then poured into the h and lead and glass drop down at one once T method Is based upon the quick 1 loal al fc ing of the glass whereby y a cir circular cillar p is produced the outline of which vorrest porres to the hole mazle mafle in the clay when u ni lead I 1 ls Is conred ou red u upon on clat so 0 o that st n gener venerated rene rated tes from the te mo moisture st ure the le if i ta tery ry apt to fly putty although of more elpe expensive asive la Is much to be clay for use in connection with molten american machinist |