126 



GAS-METER. 

 Fig. 27, 



Mr. Lowe used this instrument at the Chartered Gas-works in 1823 ; it has 

 since been adopted by many, but not so generally as it ought to be. 



The case of a station-meter is generally ornamented, sometimes tastefully 

 enough, but very often in an elaborate and unmeaning manner, covered with 

 small insignificant scrolls and Latin inscriptions ; the cost in some instances 

 exceeding that of the machinery. I much prefer a simple Tuscan pedestal, 

 relieved by a base and cornice, having perhaps upon the dado a panel, or 

 four pilasters in the front. 



The consumer's meter is constructed upon precisely the same principle 

 as that shown in Plate XV. ; but the partitions of the drum are differently 

 arranged, and placed in such a manner, that, as they reach the water, the sur- 

 face presented shall be as small as possible, or the resistance offered shall 

 be so gradual that the stream of gas flowing through the machine is uniform 

 and constant. This is necessary in a meter from which any number of lamps 

 are immediately supplied ; because the most minute diminution or increase of 

 the volume of gas flowing to them would cause a variation in the light, and 



