Handbook of Mathematical Functions
Ionization Potentials
Ionization Potentials (II)
NIST Atomic Spectra Database
NRL Plasma Formulary (pdf)
Paschen curve for some gases
Physical Constants (NIST)
Physical Constants (table)
Radiation Lengths
Table of Integrals
UNIX Tutorial for Beginners
LaTeX Symbols and more
Passage of Particles through Matter
Some Indexes (or Indices) of Refraction
Perieodic Table of Elements

Princeton Instrument ProEM 1024B camera specs
Princeton Instrument cameras manual
All Reflective Objective