GLUING UP 123 



ing in the kitchen range, place two irons or bricks 

 a foot or so apart, and with thin pieces of wood top- 

 ping them, on the stove over the fire (stove cover- 

 holes remaining closed), and lay his strips athwart 

 these wood supports till hot, without injury. Or 

 a kitchen gas-range may be used, by placing the irons 

 or bricks with a sheet of tin over them to cover two 

 holes, and laying the pieces of wood to hold the 

 strips atop the tin. 



While the function fulfilled by the glue in binding 

 the strips together is tremendously effective from 

 the standpoint of the increased rigidity of the glued 

 joint as compared with its strips when simply bound 

 together by windings, it nevertheless is true that all 

 the glue has to accomplish is to hold the strips from 

 sliding one against another that is, to prevent 

 them from acting individually instead of as a solid 

 homogeneous piece, when a bending strain is ap- 

 plied. Now, a very slight adhesive force between 

 the strips will suffice for this when it is distributed 

 along their whole length, especially when this bond 

 is supplemented by the ferrules at the ends of the 

 joints, by the line-guide wrappings, and by the other 

 strong, permanent silk-windings held in a plentiful 

 coating of varnish. 



The malleability of the joints, and just how they 

 act before the glue has stiffened, may be well ob- 

 served in a joint whose finished strips are assembled 

 and held by a snug temporary winding, without any 



