BAIRD &TATLOCK. (LONDON) LTD. 



4350 



4350 Watch Glasses, of strong glass, with flat bottom. 



Diameter 

 Price 



4351 Watch Glasses, porcelain, 2 and z\ in. 



4352 Watch Glasses, glass tared, z\ in. 



4353 Watch Glasses, glass tared, 3 in. 



4354 Watch Glasses, glass paired, 2 in. 



4355 Watch Glasses, glass paired, 2i in. 



2 

 1/3 



14/- 



2\ in. 



1 /9 per doz. 

 20 /- per gross. 



each 4d. and 

 per pair 



., 



per pair, 3d. ; per doz. 

 5d.; 



005 

 1 3 

 1 6 

 026 

 046 



4356 4357 



4356 Spectrum Analysis Tubes, with glass stopper and polished sides- 



Length . . . . . . . . 5 10 15 



Price .. .. .. I/- 1/2 1/6 



4357 Spectrum Analysis Bottles, with flat polished sides 



20 cm. 

 1/9 each. 



1 



4358 4360 



4358 s Spectrum Tube, with electrodes filled with various gases. H, N, O, CO 2 , Cl, B, I, Cy 



and vapour of Hg . . . . . . . . each 036 



4359 s Spectrum Tubes, as above, filled with Argon or Helium . . . . . . . . 0126 



4360 s Spectrum Tube, with electrodes and two stopcocks for exhausting and filling with required 



gas 



056 



CROSS STREET HATTCTN GARDEN, E- C 



810 



