BAIRD &TATLOCK (LONDON) LTD. 



3489 



3488 



3490 



3488 s The " Sparsam " Burner, provisionally protected, as devised by Dr. G. H. Pethybridge, 

 of the Royal College of Science, Dublin . . . . . . each, 3/3 ; per doz. 



This is a new and greatly improved pattern oi Bunsen burner, designed specially for the bacteriological work- 

 table, and suitable for general laboratory use. It is provided with a special stopcock, by means of which the 

 air and the gas are simultaneously regulated, and the necessity for a special bye-pass jet is done away with. 



The following are some of the special advantages of this burner : 



1. Any size of flame, either luminous or non-luminous, can be immediately obtained by merely turning the 

 stopcock, one hand only being required. 



2. The flame can be turned quite low without being extinguished, and without catching back. 



3. The minimum luminous flame serves as a bye-pass jet, thus rendering a special jet and its regulating 

 screw superfluous. 



4. The burner can only be completely extinguished by turning off the tap on the laboratory bench, thus 

 avoiding diffusion through the rubber tube when the burner is not in use. 



5. The mechanism of the burner is exceedingly simple and strong, so that it will stand continuous wear. 



6. A great saving of gas is effected, as when not actually in use the burner is turned low ; the atmosphere 

 of a laboratory in which many of these burners are in use will become considerably less unpleasantly heated 

 than is usuallv the case. 



1 17 6 



3489 Bunsen Burners, with broad flame for heating tubes, width across top 4 in. 



each 050 



3490 Bunsen Burner, |-in. tube, with broad flame adapter screwed to fit, width 2 in., for heating 

 tubes, etc. . . . . . . . . . . . . . . . each 



030 



3491 



3491 Gas Burner, 8 in. across support for vessel 



3492 Gas Burner, 4^ in. across support for vessel 



3492 



each, 1/3; per doz. 14 



I/-; 11 6 



CROSS STREET HATTOTST GARDETST, E-C 



656 



