60 Mr Mitchell's Description of an Improved Water-Meier. 



indicating accurately the smallest as well as the largest quan- 

 tities. From the small cost, too, at which they can be manu- 

 factured, it is to be hoped they will soon be brought into ge- 

 neral use, and substituted for the present unequal mode of wa- 

 ter assessment tipon house rent. 



Reference to the Plate. 

 A B C D. Outer case of thin cast iron for enclosing the apparatus shewn 



in section. 

 a a. Archimedean screw working in the cylinder 6 h. 

 c c. Thin brass wings or flys, with adjusting screws for regulating the 



motion of the screw. 

 d. Pinion upon the end of the screw-spindle or axis. 

 V e e. Train of wheels set in motion by the pinion rf, to indicate the 



quantity passed through the cylinder, closed in with a glass front. 

 /. Supply pipe. 



g. Valve worked by the lever h h, connected to the ball float i. 

 h h. Lever for opening and shutting the valve g. 

 k. Discharge-pipe flowing into the cistern II. 

 m. Air vessel to prevent injuring the pipe on opening and shutting of 



the valve. 

 n n. Lever, with lead to retain the valve open or shut. 

 and j9j!>. Arms fixed upon the end of the lever h h, and attached with 



chains to the lead- weight n. 



Report of Committee. 

 Your Committee having met with Mr Mitchell, and hav- 

 ing again heard his explanations, and carefully examined the 

 water meter submitted to them, came to the following con- 

 clusions : — 



1. That as far as they can judge, this meter may be consi- 

 dered sufficiently accurate to form a fair measure between 

 water companies and their customers. 



2. That its construction is simple, and well devised for 

 permanent practical use, being little subject to derangement 

 from the wear of its parts. 



3. That its rate of registration being susceptible of easy 

 adjustment, either in plus or minus degree, and its actual de- 

 livery, during certain portions of time, being always ascertain- 

 able by the consumer, its use may be adopted with confidence, 

 as being alike equitable to the suppliers and the consumers. 



All which is respectfully reported by 



Thos. Greig, Convr. 

 nth December 1842. 



