Bulletin 44 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

Programme of future exhibitions, SSSERC services

4(2) Reports summary

A summary of the various equipment reports published since SSSERC’s inception.

8(6) Transistor amplifier

A circuit is given for a low input impedance pre-amplifier suitable for working into an oscilloscope.

9(7) Display Laboratory

An updated list of the apparatus on display

10(8) Trade News

11(9) In The Workshop – mobile fume cupboard  (Part 2)

Ne continue here the description of the mobile fume chamber which was started in Bulletin 43.

14(12) Address List

Bulletin 45 Complete

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

3(1) Opinion

Metrication and SI units

3(1) Oxidation of ethanol

A safe method to oxidise ethanol to acetic acid by passing it over heated copper oxide.

5(3) Coddington lenses

We find some examples.

5(3) Gas analysis tubes

Gas  analysis J-tubes is usually controlled by an OBA screws. We have a cheaper/simpler version.

5(3) Locust supply

We have locusts to spare.

6(4) Manometer liquid

A safer option is congo red in aqueous solution.

6(4) Test Reports

List of test reports on: microscopes, centrifuges, balances, Conductivity Apparatus and pH meters.

8(6) Trade News

10(8) In The Workshop – projection air table

The air table described is intended as a demonstration piece of apparatus for use with an overhead projector,.

12(10) Storage of connector leads

A suggestion for a rack for the storage of connecting leads.

13(11) Bulletin Supplement – microscopes

A summary of tests carried out on microscopes.

14(12) Address List

Bulletin 46 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

Microscope testing

3(1) Chemical hazard

How to safely carry out the zinc-sulphur reaction.

5(3) Cost of gas preparation

The comparative costs of obtaining a sample of the commoner gases

5(3) Toluene, erratum

In Bulletin 41 we incorrectly referred to toluol rather than toluene.

5(3) Flame tests for halogen ion

The presence of a halogen element in organic compounds can sometimes be demonstrated by a simple flame test.

6(4) Gas storage and delivery

An aspirator can be used in conjunction with a polythene bag to give a controlled supply of dry air., or of any other gas.

6(4) Molecular weight determination

An alternative to the method described in Bulletin 21

7(5) specification and test procedure for H grade microscopes

The specification and test procedure for H and post-H grade microscopes replace those given in Bulletins 7, 9 and 11.

13(11) Trade news

14(12) Address List

Bulletin 47 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

Upcoming exhibitions, Back numbers of bulletins

3(1) Opinion  

In-service training

5(3) Surplus equipment available

7(5) Beat frequency experiment

A method for experimental verification that the beat frequency between two oscillations is the difference between the individual frequencies.

8(6) The school pond

A request for comments, specifications etc.

8(6) Microscope test procedure, correction.

A clarification and correction of the item in Bulletin 46.

9(7) Display Laboratory

Latest additions.

10(8) In The Workshop – polarimeter

A simple design for a DIY polarimeter.

12(10) Gas collector

A quick  method of providing from gas generators of various types an individual pupil sample, usually in a test-tube.

13(11) Bulletin Supplement — stereomicroscopes

A summary of tests carried out on a selection of stereo-microscopes.

14(12) Address List

Bulletin 48 Complete

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

3(1) Opinion

New schools

4(2) Mercury vapour hazard

We investigate the risk.

5(3) Specification and test procedure for ‘O’-grade microscopes

The specification and test procedure which follow will replace those originally laid down in Bulletins 7 and 9 for microscopes for ‘O’-grade work.

9(7) Reaction timing

Some biology teachers who wish a more exact or more sophisticated reaction timer than that described in Bulletin 9, may not be aware that the physics department of most schools will possess such an instrument, a scaler/timer.

9(7) Alkaline cell electrolyte

The recipe for the electrolyte used in alkaline accumulators, either nickel-iron or nickel-cadmium types.

9(7) In The Workshop – test-tube rack

A DIY test tube rack, made from sheet metal folded in a Z form.

11(9) Compensated respirometer

A design using two 20ml plastic syringes, the nozzles of which fit directly into three-way taps.

12(10) Polythene dip-coating

Details of a dip-coating process which covers metal objects with a layer of polythene

14(12) Address List

Bulletin 49 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

Exhibitions

3(1) Velocity of sound in a rod

A method for determining the velocity of sound in a metal rod by investigating impact times.

7(5) pH meter

A summary of the Chandos A47 pH meter.

7(5) Reduction of metallic oxides

We think it worthwhile to give a reduction technique which uses hydrogen but does not have associated with it the dangers that hydrogen from cylinders or even the more conventional gas generators carries.

8(6) Spark generator

An E.H.T. generator based on a car ignition coil.

9(7) In The Workshop – aquarium aerator

A system of aquarium aeration which will operate off l2V.

13(11) Bulletin Supplement – pH meters

A summary of tests carried out on a selection of pH meters;

14(12) Address List

Bulletin 50 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

Secondment of director

3(1) Gas analysis

Most teachers will have found that the J- capillary tube gives better results for gas analysis, and is easier to use, than the gas burette. We published a modification to the capillary tube in Bulletin 45; we have now simplified the whole analysis procedure further.

6(4) Test procedure correction

We mis-labelled a slide in Bulletin 48

6(4) Dissecting pins

Use syringe needles instead.

6(4) Aquaria for Xenopus

Use a polythene stackable tray as a heated water bath with two plastic aquaria containing the animals inside it.

7(5) Laboratory hazards

We ask for information of any incidents.

7(5) In The Workshop – wind direction recorder

Since weather fronts do not occur conveniently during school hours, a wind direction recorder is called for. We have a simple design.

12(10) Address List

13(11) Bulletin Index, Nos. 40 – 49.

Bulletin 51 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

Purchase and use of surplus equipment

4(2) Display Laboratory

New items on show.

5(3) Measurement of velocity of sound in a rod

An extension to the activity described in Bulletin 49.

5(3) Surplus equipment available

9(7) Stereo microscopes

Further comments.

10(8) Storage of pH electrodes

A simple way of avoiding them drying out.

10(8) Natural gas equipment

Satisfactory equipment availability.

11(9) Trade News

12(10) In the Workshop – U2 cell mount

Using a rectangular profile gutter pipe to make a mount for a U2 size cell.

13(11) Bulletin Supplement – pH meters

A summary of test reports on a selection of pH meters.

14(12) Addresses

Bulletin 52 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 Meeting, holiday closures,

4(2) Opinion

Circulation of Bulletin in schools

4(2) Slides and transparencies for the new syllabus

We have drawn up the following lists of recommended. slides and transparencies for the new biology syllabus.

6(4) Injecting Xenopus laevis 

Where to find instructions.

7(5) Test Procedure for Colorimeters

Our methodology for testing.

8(6) Gas chromatography

In Bulletin 39 we described an apparatus for gas chromatography. More developments

9(7) Relative weightlessness

A method for demonstrating relative weightlessness.

9(7) Current capacity of small NiFe cells

We investigate the current these cells can produce.

9(7) Sound through a vacuum

Does the classic bell in a jar experiment really mean what we think?

10(8) Pin Hole camera in reverse

An interesting optics item.

10(8) In the Workshop -Test tube racks

Improvements on the design from Bulletin 48.

11(9) In the Workshop -Gas pump for gas chromatography

An aquarium aerator pump of the diaphragm type in moulded plastic case can be converted quite easily for compression of gases as well as air.

11(9) In the Workshop – A microscope eyepiece pointer

Made from thin wire, e.g. 5A fuse wire.

12(10) Trade News

13(11) Bulletin Supplement – Slides and transparencies

14(12) Address List