88 



Notes on Chemist?-]/, 8fC. 



3. Curious effects of a current of air on the flame of lamps, &fC. — 

 The singular change of direction produced by introducing into the 

 axis of an Argand burner a jet from which a current of air is forced, 

 of which an account is given in the Lond. and Edin. Phil. Mag. for 

 November, 1835, led me to notice some effects of currents of air on 

 the flame of a common lamp. If a small tube, of the size of the 

 barrel of a quill, be blown through strongly with the mouth, while 

 in the positions shown in the figures below, the flame of the lamp 

 will be drawn from its course towards the orifice of the tube in a 

 very singular manner. The figures show some of the results. 



A, the flame before affected by a current. 



B, C, D, position of the flame under the influence of the currents. 

 These effects evidently depend for an explanation upon the same 



principles as the well known experiment with a tube and disk. 

 West Point, Nov. 26, 1836. 



