FREE BOOKS

Author's List




PREV.   NEXT  
|<   58   59   60   61   62   63   64   65   66   67   68   69   70   71   72   73   74   75   76   77   78   79   80   81   82  
83   84   85   86   87   88   89   90   91   92   93   94   >>  
bit of round metal not unlike a beet in shape and, pressing it inside the soft glass, made the depression for the nose. All this was done in much less time than it takes to tell it. A small boy, or carrier, now bobbed up at just the proper moment and taking the pitcher on his wooden fork carried it off to a small furnace where it was reheated at the opening or "glory hole." This little furnace, Mr. Wyman said, was used only for the purpose of softening glass objects which became chilled in the modeling and began to be hard and less pliable. As soon as the boy brought the pitcher back another lad, as if calculating by magic the precise moment at which to appear, approached with a small mass of molten glass at the end of his gathering-iron. This he stuck firmly against the pitcher at the correct spot to form the base of the handle; the modeler snipped off with his shears as much of the soft glass as he thought necessary, turned it up, and in the twinkling of an eye fastened the upper end of the handle in place. Then he surveyed his handiwork an instant to make sure that it was symmetrical, straightened it just a shade with his battledore of charred wood, and passed it over to the carrier, who bore it off to be baked. "Why do they use so much charred wood for the shaping?" inquired Jean. "Metal things are liable to mark the glass, leaving upon it a print, scratch, or other imperfection; charred wood, when worn down, is absolutely smooth and cannot mar the material." "Oh, yes, I see. And where have they taken the pitcher now?" "We will follow it," replied the foreman. Escorting them across the room he showed them a low oven or kiln. The door of it was open, and inside they could see all sorts of glassware which had just been finished. "Here is where your pitcher will remain for the next three days," said he. "We build a fire, put the completed glass in the oven, and leave it there until the fire goes out and the oven gradually cools; we call the process annealing. It prevents the glass from breaking when exposed to friction or to the atmosphere. Glass is very brittle, and extremely sensitive to heat and cold. If it were not annealed it would not be strong, and would snap to pieces the moment it came in contact with the outer air. Now it is very difficult to anneal glass, the trouble being that all hollow ware is one temperature on the inside and another on the outside. Hence, when heated, the inside takes longe
PREV.   NEXT  
|<   58   59   60   61   62   63   64   65   66   67   68   69   70   71   72   73   74   75   76   77   78   79   80   81   82  
83   84   85   86   87   88   89   90   91   92   93   94   >>  



Top keywords:

pitcher

 

inside

 

moment

 

charred

 

furnace

 

handle

 
carrier
 

scratch

 

glassware

 

finished


foreman
 

Escorting

 

imperfection

 

replied

 

material

 

follow

 

remain

 

absolutely

 
showed
 

smooth


annealing

 
pieces
 

contact

 

strong

 

annealed

 
difficult
 

temperature

 
heated
 

anneal

 

trouble


hollow

 

sensitive

 

extremely

 

gradually

 

completed

 

friction

 

exposed

 
atmosphere
 

brittle

 

breaking


process
 
prevents
 

symmetrical

 
softening
 
purpose
 
objects
 

chilled

 

modeling

 

calculating

 

brought