Bulletin 134 Complete

The page numbers refer to the pages in the pdf. (The numbers in brackets are those given in the actual bulletin)

3(1) Introduction

ASE annual meetings, Cost index, Money, money, money! 1.

4(2) Opinion

Subjects on which a lot of ‘‘rubbish’’ is spoken.

5(3) Re-usable plastic Petri dishes 3

We examine the reusability and sterilisation of polycarbonate Petri dishes.

6(4) Electron direction indicator

The electron direction indicator tells a pupil directly at which electrodes oxidation and reduction are occurring and also shows the direction of electron flow.

7(5) Chemicals costs

Variation between suppliers

8(6) Trade News

Bulletin 135 Complete

The page numbers refer to the pages in the pdf. (The numbers in brackets are those given in the actual bulletin)

3(1) Introduction

Exciting times? Balance in the bulletin

4(2) ZX Spectrum power supplies

We have been informed by Griffin and George Ltd.,  that certain Sinclair ZX Spectrums may have been supplied with mains adaptor power supplies which could be faulty. Under certain conditions, this fault could be a danger.

4(2) A Savonius rotor

An alternative ‘windmill’ design to the ‘normal’ one is  is the Savonius rotor

6(4) UV lamp spares

6(4) Constant volume dispensers

6(4) Some laser experiments

Optical transmission of an audio signal, Reflection off water waves

9(7) Interfacing Notes – have you read?

We have produced a reading list of articles on interfacing.

9(7) User port BBC model B

The first of a series of articles on the ‘Beeb’ model B. We thought it would be helpful to provide information on d-i-y interfacing.

18(16) Surplus Equipment Offer

19(17) SSERC Display Laboratory

The SSERC Display Laboratory is again open for business after repairs.

19(17) Trade News

Bulletin 136 Complete

The page numbers refer to the pages in the pdf. (The numbers in brackets are those given in the actual bulletin)

3(1) Introduction

Development Officer, Saturday mornings, Cost index, Research in schools, CLEAPSE Guides (More guides to borrow), Review – ‘The Gass Book”

3(1) preparation of chlorine

The attention of readers is drawn to this report, from the Laboratory Safeguards Sub-committee of the ASE. Discussed is a hitherto unsuspected hazard, the formation of dichlorine oxide(Cl2O), during the preparation of chlorine by the action of hydrochloric acid on sodium chlorate(I) solution.

4(2) Pipette fillers

Badly cut fingers during the fitting of the pipette onto the filler

4(2) Silicon tetrachloride

Just as a teacher was about to open a bottle of the chemical it exploded, sending the contents over the room.

4(2) Turbid cube substitute

A simple turbid block substitute based on the lid of a cover-slip box.

5(3) Skin sensitivity

A template for making ‘patent’ skin, touch-sensitivity testers.

6(4) Fabric wear testers

A design for a relatively cheap. robust and easily constructed fabric wear tester.

7(5) Interfacing Notes

‘ Beeb’ user port part 2 – timing

16(14) Fabric wear testers

How to make the testers described earlier

20(18) Trade News

Bulletin 137 Complete

The page numbers refer to the pages in the pdf. (The numbers in brackets are those given in the actual bulletin)

3(1) Introduction

Congratulations, thanks and farewells, Saturday mornings

3(1) ASE Safeguards announcements

3(1) Laboratory centrifuges

The recently published British Standard specification “Safety Requirements for Laboratory Centrifuges” (BS4402:1982), does cover small bench top centrifuges of the type used in schools. However, we are anxious to ensure that schools and education authorities avoid overkill in reacting to its provisions.

4(2) Sodium lamp holder

A pupil using a Sodium Lamp in an experiment with a spectrometer, received an electric shock when the shade came into contact with the pins of the lampholder.

5(3) Wave power

Three alternative model devices for producing electricity from the energy of waves are illustrated.

6(4) Wave maker

A powered device for generating the necessary waves above

7(5) Metal bending apparatus

We were requested to provide a d-i-y design so that those who wished to do so, might construct their own tester.

7(5) Interfacing Notes

Review of microcomputer data capture devices

18(16) Wave power generators

How to construct the generators mentioned earlier.

23(21) Metal bending apparatus

How to construct the apparatus mentioned earlier.

25(23) Trade News

Bulletin 138 Complete

The page numbers refer to the pages in the pdf. (The numbers in brackets are those given in the actual bulletin)

3()(Insert) Microelectronic Applications Projects in Schools: Two Year Fellowship 1984-1986

5(1) Introduction

Technical Officer, Planning Committee, Evaluation samples offer, Christmas and New Year closure, Pick another number

5(1) Opinion

Caveat Emptor

5(1) CLEAPSE guides

A small number available to borrow.

6(2) accident reports

Hydrogen explosion – again! Chlorine, Exploding batteries, Conc. sulphuric acid – again!

7(2) Electrical safety

Modification for a Russian fast response chart recorder.

7(2) Energy in the home

Investigation of heat losses in model houses and of some ways of reducing those losses.

13(9) VELA – a review

A review of the Versatile VELA datalogger.

18(14) Surplus Equipment

19(15) Model houses

How to make the model houses for the energy experiments.

21(17) Trade News