Teachers' guide 2 - National STEM Centre

Appendix 2
Apparatus, materials, and reagents
Apparatus
In this Teachers' Guide the apparatus required to perform each experiment is
listed before the experiment is described. Some experiments require apparatus
that is not generally available, and for others, it is possible to construct apparatus
as an alternative to that which is commercially available. The construction of
this apparatus is described here.
1 Syringes and accessories
Gas syringes*
Exelo Glass 100 cm 3 with
1 cm 3 graduation marks.
W. G. Flaig & Co.,
Exelo Works, Margate Road,
Broadstairs, Kent
Summit Glass 100 cm 3 with Smith and Nephew Group,
5 cm 3 graduation marks. Southall's Ltd, Bessemer
Centre-fitting or side-fitting Road, Welwyn Garden City,
'luer' nozzle. Herts.
Stylex Plastic 50 cm 3 with Willen Bros. Ltd,
printed 1 cm 3 graduations. 44 New Cavendish Street,
London WI
2 cm 3 glass. Many types
available - should be twopiece
and all glass with
'luer' fitting: S54-550
Hypodermic needles
'luer' fittings: S54-598
Griffin and George Ltd,
Ealing Road, Alperton,
Wembley, Middlesex.
and
Smith and Nephew Group
Griffin and George Ltd
About £4 each
About £2.70 each
About 30p each
(cheaper in bulk)
About 20p each
at the dozen rate.
Dearer if bought
singly.
About 30p per
dozen, size 1 or 2.
'Star' type Smith and Nephew Group
Notes:
1 If' Summit' 100 cm 3 syringes are used, size 15 or 16 needles are suitable.
2 Care should be taken to see that 2 cm 3 syringes and hypodermic needles
both have 'luer' fittings; 'record' fitting needles are not suitable for 'luer'
syringes.
*A useful book is: Rogers, M. (1970) Gas syringe experiments, Heinemann.
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