He listened, and read his book, and recalled the whole train of ideas suggested by his reading.
It was Tyndall's _Treatise on Heat_.
He recalled his own criticisms of Tyndall of his complacent satisfaction in the cleverness of his experiments, and for his lack of philosophic insight.
And suddenly there floated into his mind the joyful thought: "In two years' time I shall have two Dutch cows; Pava herself will perhaps still be alive, a dozen young daughters of Berkoot and the three others--how lovely!" He took up his book again.
" Very good, electricity and heat are the same thing; but is it possible to substitute the one quantity for the other in the equation for the solution of any problem? No.