Tirrill Natural Gas Bunsen Burner with Cast Iron StabiliBase and Gas Flow Control Human Anatomy_Human Anatomy Charts & Models Plano-cylindrical lens at 50 by

Plano-cylindrical lens at 50 by 50mm with 17 diopter optical power and ground polished edges

Wooden-handled bimetallic strip of bonded copper and steel

this 15-inch motion-converter model shows the engineering principle behind crankshaft pistons and rotary-to-linear mechanisms

Wood-baseboard sonometer 98 x 9cm on four feet

Tirrill Natural Gas Bunsen Burner with Cast Iron StabiliBase and Gas Flow Control Human Anatomy_Human Anatomy Charts & Models Plano-cylindrical lens at 50 byNatural gas Tirrill Bunsen burner pairing a gas flow valve with air flow adjustment for finer flame control, set on a cast iron anti tip base for bench stability.