472 



WEIGHT AND SPECIFIC GRAVITY OF DIFFERENT GASES. 



Tf atmospheric air be taken at unity (1), then the various gases will stand as 

 under : 



Atmospheric air . . 

 Ammoniacal gas 

 Carbonic acid . 

 Carbonic oxide . 

 Carburetted hydrogen 

 Chlorine . 

 Chlorecarbonous acid 

 Chloroprussic acid ,. 

 Cyanogon 

 Euchlorine 

 Fluoboric acid . 

 Fluosilicie acid . 

 Hydriodie acid . 



1.000 

 0.500 

 1.527 

 0.972 

 0.972 

 2.500 

 3.472 

 2.152 

 1.805 

 2.440 

 2.371 

 3.632 

 4.346 



Hydrogen .... 0-69 



Muriatic acid .... 1.284 



Nitric oxide .... 1.041 



Nitrogen 0.972 



Nitrous acid .... 2.638 



Nitrous oxide .... 1 .527 



Oxygen 1.111 



Phosphuretted hydrogen . . 0.902 



Prussic acid .... 0.937 



Subcarburetted hydrogen . . 0.555 



Subphosphuretted ditto . . 0.972 

 Sulphuretted ditto . . .1.180 



Sulphureous acid ... . 2.222 



CONCLUSION. 



THE reader will have seen in this volume how the road to abstract 

 science may be smoothed ; but he may rest assured that any popular 

 version of Hydrostatics is quite illusory, for no portion of sound know- 

 ledge was ever acquired without some corresponding exertion of mind. 

 It is one of the improvements to be made in our systems of education 

 for the various professions, and in books written to retrieve the de- 

 clining taste for science, that students in Mechanics should devote 

 themselves methodically to the profitable but toilsome drudgery of 

 computation ; and, in their geometrical constructions, be as clever 

 with their hands as ingenious with their heads. Science and know- 

 ledge are subject, in their extension and increase, to this law of 

 progression : the further we advance, instead of anticipating the ex- 

 haustion of their treasures, the larger the field becomes the greater 

 power it bestows upon its cultivators to add new measures to its 

 rapidly-expanding dominions. It is the science of calculation which 

 has grasped the mighty masses of the universe, and reduced their 

 wanderings to fixed laws ; which prepares its fetters to chain the 

 flood, to bind the ethereal fluid ; and which must ultimately govern 

 the whole application of Hydrostatics to the Arts of Life. 



London : J. Rider, Printer, 14, Bartholomew Close. 



