BAIR.D &TATLOCK (LOTSfDON) LTD. 



F. I.R. corks for fitting E in D . . . . . . . . . . . . . . 003 



G. Gas regulator, Lowry's pattern (unfilled), made of Resistance glass . . . . 050 



H. I.R. corks for fitting G in A . . . . . . ..012 



I. Felt discs for bottom of copper pots in A . . . . . . ..003 



J. Felt discs, split with hole in centre for tops of copper pots in A . . . . 004 



K. Mouthpiece, suction, of glass with stopcock . . . . . . . . ..019 



L. Glass air reservoir, 50 cubic centimetres . . . . . . ..016 



M. Capillary metal tube for filling gas regulators G . . . . . . ..020 



N. Retort stand, sole 12 by 6 in., with 36 in. rod for supporting tubing connected to gas 



regulator G . . . . . . . . . . . . . . ..046 



0. Pipettes, glass, 10 cubic centimetres . . . . . . . . . . ..006 



P. Tubing, indiarubber, J in. bore, heavy walls . . . . . . per yard 111 



Q. Tubing, metallic, copper flexible, J in. bore .. .. '.. 023 



R. Connections for Q .. .. .. .. .. each, 2d. ; per doz. 1 10 



3627 



3629 



3630 



3627 Dr. Dupre's Heat Tester, as applied to explosives of the nitro-compound class (Explosives 



Act, 1875), and used in Government laboratories, consisting of tripod, copper cylinder with 

 mica window, copper water bath with white japanned lid, in which are four holes, one 

 for thermometer and three for test tubes . . . . . . . . . . . . 2150 



3628 Argand Burner for Dr. Dupre's Heat Tester . . ..086 



3629 Test Tubes for use with above, special quality to comply with Government specification, of 



uniform capacity, with 3 marks . . . . . . . . . . . . per doz. 050 



3630 Set of Strong Copper Sieves, with lid and bottom for cordite test . . 0150 



3631 s Heat Test Papers, answering " Home Office " specification . . per 1,000 in brown bottle 13 6 



(1,000 smallest quantity supplied.) 



ICHEMICAL AND SCIENTIFIC APPARATUS AND PURE CHEMICALS. 



681 



