The law of the mutual force in our model, however, is not the simple Newtonian law, but the much more complex law of the mutual action between electro magnetswith this difference, that in the hydro-kinetic model in every case the force is opposite in direction to the corresponding force in the electro-magnetic analogue.

And now, having done what he considered his duty, Frank began to think it might be the part of wisdom for himself and his cousin to consider their own affairs, and make for the spot where their hydro-aeroplane lay in the field.

The oleaginous group comprises all oily matters, which are even purer hydro-carbons than the first-mentioned class.

If very heavy, run through lukewarm water slightly acidulated with vitriol, rinse, hydro-extract, and hang in stove.