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.Sr. 



BAIRD cVTATLOCK (LONDON) LTD. 



4766 



4766 T Gas Analysis Apparatus, designed by Professors Bone and Wheeler, for technical gas 



analysis. Price on teak wood stand . . . . . . . . . . . . 10 10 



4767 T Gas Analysis Apparatus, as above, with lens reading arrangement, on teak wood stand .. 11 10 

 4768 T Extra laboratory vessel for Nos. 4766-4767 . . . . . . . . . . . . 0106 



4769 T absorption vessel, with two stopcocks, for Nos. 4766-4767 . . . . . . 0126 



4770 1 measuring tube for Nos. 4766-4767 .. .. .. ..160 



DESCRIPTION OF APPARATUS. 



This apparatus has been designed by Professor Bone and Mr. Wheeler in response to repeated requests for a convenient and 

 not too costly adaptation of the gas analysis apparatus used throughout their researches on combustion, which shall meet the 

 daily requirements of a commercial or research laboratory. 



The general character and arrangement of the various parts of the apparatus will be readily understood, with the aid of the 

 accompanying diagram, by all who are familiar with the methods of gas analysis. It comprises, essentially, three parts, viz., 

 (i) a water- jacketed combination of measuring and pressure tubes A and B, communicating, through the glass tap c, with the 

 mercury reservoir D ; (2) an absorption vessel F standing over mercury in a mahogany trough G ; (3) an explosion tube E fitted 

 with firing wires, and connected with a separate mercury reservoir H. All the connections between A, E, and F are of capillary 

 bore throughout, with suitable glass taps wherever necessary. The diagram also shows how connection is made between the 

 measuring tube A and the special " sampling tube " K whenever the latter is employed for the introduction of the sample under 

 examination. The sample may also be introduced into the apparatus, from an ordinary test-tube, under the wide open end 

 of the absorption vessel F, which has been previously rilled with mercury. Before commencing an analysis, the whole of the 

 apparatus including all the connections between A, E, and F, is completely filled with mercury, and, needless to say, all the 

 subsequent operations are conducted over mercury. 



14 -CROSS STREET HATTCHSr GARDETST, E-C- 



868 



