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Friction Blocks and Surface Set
Friction Blocks and Surface Set
15878

For introducing the concept that friction depends on the nature and smoothness of materials. The kit consists of three wooden blocks, L x W, 100mm x 70mm, with hooks. One with a highly polished side, second with a sandpaper side and third with an aluminum side. Complete with a polished wooden base about, L x W, 355mm x 70mm. Instructions included.
For introducing the concept that friction depends on the nature and smoothness of materials. The kit consists of three wooden blocks, L x W, 100mm x 70mm, with hooks. One with a highly polished side, second with a sandpaper side and third with an aluminum side. Complete with a polished wooden base about, L x W, 355mm x 70mm. Instructions included.

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$11.50 Each
Bar and Gauge
Bar and Gauge
14699

Illustrates linear and spherical expansion by heating and contraction by cooling. Mild steel bar 110x12.5mm, length x diameter. Mounted on a rod with wooden handle and a brass gauge 150x38mm with a cutout mounted on a separate wooden handle which just admits the bar lengthways and a hole into which the bar passes endways when cold.
Illustrates linear and spherical expansion by heating and contraction by cooling. Mild steel bar 110x12.5mm, length x diameter. Mounted on a rod with wooden handle and a brass gauge 150x38mm with a cutout mounted on a separate wooden handle which just admits the bar lengthways and a hole into which the bar passes endways when cold.

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$10.95 Each
Gas Convection Apparatus
Gas Convection Apparatus
14698

Metal construction. With sliding plate glass front. Two glass chimneys. Candle holder is mounted in the box.
Metal construction. With sliding plate glass front. Two glass chimneys. Candle holder is mounted in the box.

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$24.50 Each
Ball and Ring
Ball and Ring
11737

Demonstrates expansion of metals with heat.
Demonstrates expansion of metals with heat.

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$13.50 Each