Scientific Laboratory Instruments & Equipments, Apparatus, Glassware, Optical Instruments, Hydrometers, Thermometers, Crooks Radiometers, Spectrum Analysis Tubes, Induction Coils, Both Interrupter & Electronic Models, Tesla Coils, Wimshurst Machine (both Hand And Motor Driven) van De Graaf Generators (both Hand And Motor Driven), Large Variety Science Museum Apparatus, etc.