nuffield physics: guide to apparatus - National STEM Centre

Nuffield Physics Guide to Apparatus .:'. : :\ : •' . 42
144 Demountable discharge tube for positive rays optional
See page 56, where details are given of the optional items.
145 Demonstration thermometer
Quantity required:
1 per school.
In certain demonstration experiments on heat exchanges, it is essential
for pupils to be able to see the temperature change and not merely to
be told about it by the teacher reading a mercury-in-glass thermometer.
A thermometer with a dial is therefore necessary. Mercury-in-steel
dial thermometers are ideal, but expensive. Bimetallic thermometers
are satisfactory. The range — 20°C to 120°C would be ideal; 0°C to
80°C can be used.
146 Inertia balance kit
Quantity required:
1 per class of 32. It contains 16 sets of apparatus enabling pupils to
work in pairs.
For details of contents see Section B, page 105.
147 Demountable transformer kit
Quantity required:
1 per school.
The transformer is used for demonstration purposes. The kit
includes a basic core with a series of coils for use with it.
For details of contents see Section B, page 106.
See illustration on page 135.
148 Syringe kit
Quantity required:
1 per school (unless purchased as separate items - see 148/1, 148/2,
148/3).
For details of contents see Section B, page 107.
' This kit includes a 100ml glass syringe, as developed and used in the
Nuffield Chemistry Project, rubber caps for fitting over the end of the
syringe and an inexpensive hypodermic syringe for injecting small
quantities of water (0-1 ml) through the rubber cap into the large