Becker — A New Principle in Blowpipe Construction. 281 



some particular series of operations which has to be Carried out repeatedly. 

 Thus, in making airy piece of glass apparatus in quantity the same series of 

 operations occur regularly, and the blowpipe could be arranged to give in 

 succession the flames most suited to the different operations. 



In making a small gas wash-bottle of glass, for instance, the following 

 series of operations might occur (fig. 2) : — 



1. Draw out the glass tubing and seal off 



2. Eound the end of large tube . 



3. Blow out end of large tube 



4. Seal in the small tube 



5. Blow bulb on large tube and seal off 



6. Blow out pip for side tube 



7. Seal on side tube 



8. Bend side tube to shape 



V 



4 . ^ 



Fig. 2. 



7»8 



If this series of operations had to be carried out repeatedly, it would be a 

 great saving of time to have the blowpipe so arranged that the particular 

 flame best suited to each operation should come into operation in succession 

 at the moment it was required. 



Such an arrangement of flames could readily be obtained with the type 

 of blowpipe described. 



Chemical Department, 

 EoYAL College of Science, Dublin. 



SOIENT. PROC. K.D.S., VOL. XVI., NO. XXIIT. 



2o 



