312 MF R. Adie's Description of a new Anemometer. 



In order that the construction of this instrument may be more 

 perfectly understood, I have given a section of the different 

 parts. A is the inner cylinder, suspended by a cord passing 

 over the wheel B. C is the axis on which the wheel B is fixed. 

 D the spiral fixed on the same axis over which the weight W 



I o 



passes, counterbalancing the cylinder A. E is the index mark- 

 ing the forces on the dial-plate. F counterpoise weights to ba- 

 lance the index and spiral. G the outer cylinder filled with wa- 

 ter, into which the cylinder A passes. H the pipe through 

 which the current of air passes into the cylinder A. Pa plug 

 to let off any water that may get into the curve of the tube. 



Report of the Committee on Mr R. Adies (of Liverpool's) Anemometer. 

 (Read 25th May 1856,) 



Your Committee having examined the drawing and description of the ane- 

 mometer, and inspected the instrument itself, beg to report : 



That this instrument is admirably calculated for exhibiting minute varia- 

 tions n the elasticity of gaseous bodies-; and that it is more properly to be re- 

 garded as a pressure gauge than as an anemometer, the application to the 

 measurement of the pressure ol the wind being only one of the numerous 



