6-Prong Thermal Conductivity Apparatus with Mixed Metal Prongs Glass Flasks_Erlenmeyer Flasks designed so seated students read

designed so seated students read the needle without parallax error from a steep viewing angle

and connecting leads in one teaching package

Hand-cranked cam turning against both a straight follower and a lever follower

this hair-element hygrometer uses fiber expansion and contraction on an 85 mm dial

and gauze-fronted object and receiving screens form this 1

6-Prong Thermal Conductivity Apparatus with Mixed Metal Prongs Glass Flasks_Erlenmeyer Flasks designed so seated students readSix pronged conductometer with 3. 75 inch sample rods in aluminum, brass, copper, stainless steel, and iron, comparing heat conduction rates through wax drops on each prong.