Pocket Reference Natural Gemstone Card with 12 Identified Specimens, 1cm Each Lab Equipment_Water Baths providing a measurable projection surface

providing a measurable projection surface for sizing real images formed by lenses and concave mirrors

625 inches thick in a cast bracket on a rubber-footed wooden base

running on 3-6V DC to illustrate both motor and generator operation

27mm diameter

this phenylthiourea taste-testing set demonstrates the genetic basis of bitter-flavor perception in biology classrooms

Pocket Reference Natural Gemstone Card with 12 Identified Specimens, 1cm Each Lab Equipment_Water Baths providing a measurable projection surfaceTwelve 1cm identified gemstone specimens mount on a pocket reference card for on the go gemology identification practice in classrooms or field trips.