Real Coal Specimen with Cotton Bag, Large Lump Included_Rod & Base this galvanic skin response data-logging

this galvanic skin response data-logging sensor tracks changes in skin conductivity tied to emotional and physiological states

and the structural elements of geological faults through a five-piece teaching model with an identification key

and magnetic field — on a color touchscreen display

Larger-bore standard-taper joint pairs with an angled bend to route condensate downstream into the receiving flask during preparative organic chemistry

Five removable sections separate the enlarged ear into outer

Real Coal Specimen with Cotton Bag, Large Lump Included_Rod & Base this galvanic skin response data-loggingPart novelty gift and part geology specimen, this single large lump of genuine American coal ships in a cotton drawstring bag with a linked science experiment activity.