Reddit reviews Thermodynamics, Kinetic Theory, and Statistical Thermodynamics (3rd Edition)

Thanks for compiling all the links to those books. As for the two you couldn't find here are my best guesses:

Cancer

• Possibly due to his interest in radiation, he may have discovered some references of radiation as a possible link to the cause of cancer.
  
  
• A family member/coworker may have died of cancer.
  
  
• Just out of sheer curiosity.
  
  "2 Galaxies"
  
  
• This may be a reference to determining the distance between two galaxies using "red shift" (Engelbert Broda published a paper earlier in 1954 called Weiten des Weltalls: Unsere Milchstraße und ihre Nachbarn [Ranges of the universe: our Milky Way and its neighbors] about this subject)
  
  
• This may also be a reference a few observations about galaxies colliding made in 1951 and 1954, stated here:
  
  • "A decade later Spitzer & Baade (1951) extended Holmberg's work by considering the removal of interstellar gas (a process now called "stripping") in high velocity collisions, which they argued should be common in dense clusters of galaxies. The stage was set for what is argueably the seminal observational paper in this field, Baade and Minkowski's (1954) work announcing the discovery that "the radio source Cygnus A is an extragalactic object, two galaxies in actual collision."
    
    I also found links to the rest of the Course Material:
    
    Heat and Thermodynamics - Zemansky
    
    Thermodynacis, Kinetic Theory, Statistcal Mechanics - Sears
    
    Kinetic Theory of Gases - Kennard
    
    Thermodynamcis: An Advanced Treatment - Guggenheim
    
    (Couldn't Find) Electricity and Electromagnetism - Hornell
    
    Elements of the Theory of Functions
    
    Advanced Calculus
    
    Complex Analysis - Lars Alfors
    
    Introduction to Electric Fields - Rogers
    
    Electromagnetics - Krans
    
    Communication Circuits Fundamentals - Smith