WINDINGS AND GUIDES 167 



half-way the ferrule-tooth that lies on the flat sur- 

 face of the joint to which the guide is applied. The 

 ends both of this shank of the guide and of the 

 ferrule-tooth have previously been filed down thin 

 with the little saw-file. The wrapping is completed 

 by the wholly independent section represented by 

 D E, starting at D ; thus this section alone must be 

 removed for the purpose of re-cementing a loosened 

 female-ferrule, and the guide is not disturbed in its 

 position. 



Before securing any guides to the rod, it is most 

 important that it should experimentally have been 

 jointed up with different flat surfaces of its respec- 

 tive sections in alignment, in order to determine whar 

 particular arrangement gives the best results; and 

 when this has been accomplished you should mark 

 the guide surfaces of each joint for future identifi- 

 cation. However carefully you have endeavored to 

 center the ferrules on the joints, you probably will 

 be surprised to find when the rod is jointed up in 

 certain ways that there will be produced quite a 

 decided angular deflection at least at one of the 

 junctions, but which a slight rotation of one of the 

 connecting pieces may correct. If not satisfactor- 

 ily remedied in this way, then joint the two rod- 

 sections together in their best position and hold the 

 union both including ferrules and the wood within 

 them over the alcohol-lamp flame, heat all very 

 carefully but thoroughly, and then very cautious but 



