Bell Demonstration Model, All The Components Of Electric Bell Are Mounted On A Large Panel. Allwiring Is Visible And Parts Are Of Large Size. Operates On 4-6 Volts Dc, Mounted On A Large Panel, All Parts Easily Visible, Rigid Constructions
Kit Lead An Element Of Danger Refill, Contains: Student instructions, Santiagos blood sample, Lead Test Paper, Blood Lead Concentration Color Chart, Simulated samples of dust, water, soil, and pottery, 4 labeled droppers, 4 Lead Test Swabs, Lead Test Sheet
Test for genetic disorders, that Cause Brain Damage, unassembled kit, supplies for 10 students or groups, Kits can be used in classrooms or nonCEschool settings.They do not require microscopes or expensive equipment
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