Page:On the various forces of nature and their relations to each other.djvu/107

hydrogen gas into my lungs (it does no harm to the lungs, although it does no good to them), see what happens. [The Lecturer inhaled some hydrogen, and after one or two ineffectual attempts, succeeded in blowing a splendid bubble, which rose majestically and slowly to the ceiling of the theatre, where it burst.] That shews you very well how light a substance this is; for, notwithstanding all the heavy bad air from my lungs, and the weight of the bubble, Fig. 29.you saw how it was carried up. I want you now to consider this phenomenon of weight as indicating how exceedingly different particles are