Reading Magnifier, 50mm, 20cm Focal Length, Alternate Model Pack Size_10 Used to determine irregular-object volumes

Used to determine irregular-object volumes by water displacement

or lead to compare electrode potentials and trace the activity series experimentally

this microphone amplifier connects a microphone input to both an integrated speaker and an oscilloscope-driving amplified signal for waveform study

Iron 1-inch diameter pendulum bob for periodic-motion experiments

Reading Magnifier, 50mm, 20cm Focal Length, Alternate Model Pack Size_10 Used to determine irregular-object volumesChrome plated alternate build 50mm reading magnifier with a 20cm focal length, the wider focal distance favoring page wide field of view over higher magnification.