Physical Science

Bar and Gauge

For illustrating linear and spherical expansion by heating and contraction by cooling. Mild steel bar measures 41-5/16" L x 1/2" dia. Mounted on a rod with a wooden handle and a brass gauge 5-7/8" x 1-1/2" with a cutout mount... More.

Boyle’s Law Apparatus

Introduce students to the fascinating concept of Boyle’s Law. A funnel tube and stopcock tube, connected together by a piece of flexible tubing, run parallel to one another on aluminum rods. This allows one of the tubes to be raised higher or lowe... More.

Cloud Chamber

Contains a coupon to request a fresh alpha source, used in various experiments including “random events” and “range of alpha and beta particles.” An absorbent blotter on the inner wall of the chamber is saturated with alcohol. Th... More.

Electrostatic Electroscope

A visible demonstration of electrostatic activity! Electrostatic balls are suspended on an aluminum hook attached to a sturdy support base. When a static charge is brought near the balls, they react to the electrical charge. A teacher’s guide is p... More.

Diffraction Gratings Demo

Includes one 3-1/2" x 1-1/2" glass plate with three “windows.” The windows include one with 80 lines per mm, one with 320 lines per mm, and one with 600 lines per mm. Original Price – $21.70. More.

Leyden Jar

Dissectible, unbreakable – holds a charge for hours! Constructed of dielectric plastic, this 473 ml (1 pint) volume Leyden jar demonstrates that a charge is stored in the dielectric (insulator) and not in metal surfaces. Consists of two aluminum c... More.

Student Transmission Gratings

Quality gratings protected by two glass plates measuring 2-1/4" x 1-3/4". Viewing area measures approx. 1-3/4" x 1-1/4" (45mm x 30mm). 300 lines per mm. Original Price – $16.40. More.

Diffraction Gratings

Perform quantitative spectroscopy experiments using this good quality yet economical spectrometer. Unit is mounted on a stable base with attached collimator and rotating telescope platform. Features include a 2.6 cm diameter achromatic optical system wi... More.

K’NEX® Simple Machines – Wheel

• 211 K’NEX® pieces • Activity cards to build 10 models • Measurement device • Teacher’s guide • Supports up to 8 students • Grades 2-6 Original Price – $45.85 More.

Balsa Wood Pith Balls

Set of 12 balsa wood pith balls for electrostatic experiments. Each ball is 3/8" in diameter with hole for attaching thread. Grade 3 and up. Original Price – $3.50. More.