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Dr. Hare’s Improved Eudiometers. 
P 
Fig. 7. 
The receiver (fig. 8.) shaped like the small end of an egg, 
is employed in these experiments, being mounted so as to 
slide up and down upon a wire. splat acs plese 
‘This vessel being filled with water, and immersed in the 
pneumatic cistern, the apex being just even with the surface 
of the water, one hundred measures of atmospheric air, anda 
like quantity of nitric oxide, are to be successively introduced. 
he residual air may then be drawn into t udiome- 
ter, and ejected again into the receiver through the water, to 
promote the absorption of the nitrous acid produced. Lastly, 
it may be measured by drawing it into the instrument, and 
ejecting it into she egg-shaped receiver (fig. 8.), or into the air, 
when the quantity of it will appear, from the number of degrees 
which the sliding-rod enters during the ejection. That in 
this.way gas may be measured with great accuracy, may be 
demonstrated by transferring any number of measures, taken 
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