"Einstein, my upset stomach hates your theory — it almost hates you yourself ! How am I to provide for my students ? W…"

"You will get your difficulties with the point electron."

"In passing I have to mention a typical Ehrenfest anecdote, not such a nice one, perhaps. Lorentz lived in Haarlem and…"

"The way he taught statistical mechanics and electromagnetic theory, you got the feeling of a growing science that eme…"

""Wenn wir den Namen H. A. Lorentz lesen"

"Antonio Labriola, Storia, filosofia della storia, sociologia e materialismo storico, in Scritti varii: editi e inedit…"

"In Milan, there is only one man, who is actually a woman, Kuliscioff."

"We will erect a monument to Giordano Bruno in Campo de' Fiori, in atonement for the sins of our ancestors, whose mora…"

"Giuseppe Garibaldi was a man of the people, and of that part of the people which, through its habit of frankness, sob…"

"The doctrine of historical materialism, given the two elements of economic articulation and class friction, becomes t…"