89-Atom Molecular Model Set Capacity_150mL Reading both light and heavy

Reading both light and heavy liquids on a single dual-scale stem from 0

an aluminum transfer bar

configured to make and break a circuit at the rhythm of a Morse-code transmission for telegraph-history demonstrations

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

Engineered with a higher spring constant than a classic coiled novelty spring

89-Atom Molecular Model Set Capacity_150mL Reading both light and heavyUsed to build a moderate range of organic and inorganic molecules, this 89 atom set in a compartmented case supplies durable plastic atoms and connecting links for chemistry investigations.