Brass Specific Gravity Cylinder with Hook Geology_Geology Charts & Models the moderate-resistance moderate-current option in

the moderate-resistance moderate-current option in the compact-tube rheostat line

Square-topped wooden screw simple-machine model with a leverage block

and a stirrer for themed home-bar gifting

chloroplasts

Hand-painted male pelvis model exposes the narrower male-specific proportions and pelvic inlet shape compared to the female pelvis for sex-difference anatomy teaching

Brass Specific Gravity Cylinder with Hook Geology_Geology Charts & Models the moderate-resistance moderate-current option inBrass 2 by 0. 5 inch specific gravity cylinder with a top hook for spring scale massing, a mid density reference for comparative experiments alongside the copper and aluminum cylinders.