Show How Hole Holes Can Be Bored in Glass Cia Plates Tubes Tube Glass Class utensils plates tubes and other articles article must sometimes be drilled for tor different purposes par in laboratory and experimental mental work This Is not a difficult operation If the following method Is applied The glass elass part I is secured solidly to the table of ot a The location of the hole can be marked with the point of a black grease crayon Around this location a cup Is formed or 01 common putty The cup just large enough to hold holda a small quantity of turpentine mixed with some abrasive such luch as a. fine em emery 17 or powder |