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as we all know this morning we're

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gathered here primarily for the purpose

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of

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the crew being briefed by the students

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on the two experiments slated to fly on

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sts-26

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and here with us this morning is lord

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bruce a student

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and he's from

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mcdonald or mcdonald douglas is

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sponsoring him and he's from st louis

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okay well basically the experiment is

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very simple

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um what we're trying to observe is the

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effects of weightlessness

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on the grain formation and molecular

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uh reorganization

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of the titanium

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filaments there

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the experiment itself is uh again i say

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it's very simple what the

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astronauts will be doing is

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they'll observe for any

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discrepancies such as a broken tube or

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loose wiring or anything like that

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and

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goes on

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this will

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confirm the continuity of the circuit

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and what you'll do is

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you'll hit the master switch and

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complete the circuit and if you observe

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and you will maintain this for

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approximately

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20 seconds and that will raise the

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temperature of the of the wire up to 882

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degrees centigrade

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okay so we just need to get it above

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800 and right whatever that is

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that's where the wires are the length

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they are they were calculated to carry

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the current and create that

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temperature

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okay

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and basically that's it

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again i'd like to thank all the

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mcdonald douglas and nasa personnel for

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all the support they've given me

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and

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just to say to

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if this goes out to any students to

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try and get involved in it and it's not

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too hard to make them an experiment and

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it's really fun and interesting and you

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meet a lot of people

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well let me say something to you why you

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know this

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this isn't going to be free for you

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either we

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you know

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in the astronaut office we enjoy doing

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not because a lot of the times it's a

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nobel prize winning type science but but

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mostly because it involves young people

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like yourself getting involved very

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early in the space program and getting a

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chance to

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to work uh in the system and and getting

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us a chance to work with folks like you

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and we're always impressed with the

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with the caliber of students that we get

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to work with but we also want you to

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understand that you have a

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responsibility now to

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go back just like you said i like the

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works that you use

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to share your enthusiasm with the rest

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of your students and your

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faculty and people you work with to

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try and uh interest more

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young bright students to get involved in

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the in this program because we need all

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the good folks we can get all right we

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appreciate all the work you're doing too

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thank you

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charlie here will represent our student

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who unfortunately cannot be here

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as john indicated the

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purpose is to

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try to grow crystals in this case of

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lead iodide

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along a

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membrane

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which will be mounted

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at the

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edge where the

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inner o ring is

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on that middle bulkhead

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the membrane is actually a copolymer of

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polyethylene and polypropylene

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and it's simply there as a kind of a an

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orienter on which crystals can grow

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otherwise they would just grow

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throughout the solution and probably not

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get to any significant size and we're

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hoping to orient the growth on that

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membrane

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specifically

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it's an apparatus then with four

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chambers

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membrane in the center deionized water

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in these two inner chambers

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two valves

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and then the

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silver end will contain a lead acetate

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solution primarily the source of lead

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ion lead to plus ion and the right hand

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compartment is you see it the blue

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handle end if you like will contain

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a potassium iodide solution source of

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the iodide ions

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just before the 51 l flight rich was off

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on an internship in new york city

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at the time they needed to be loaded

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and now

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he's being in medical school

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i've tried to supervise the construction

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of the apparatus and

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he tells me when i'm wrong and things of

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i guess that outlines it

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are these crystals any

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color are they clear they are a fairly

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bright yellow color yes they'll be

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easily distinguishable to

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in their formation yeah thanks a lot

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sure

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we'll get this done soon anymore

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what has changed is they've got larger

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pure silver bromide crystals in that gel

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and that's how they increase their film

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sensitivity how they grew them i cannot

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for one find out

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but that's that's what happened now

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we're playing that same game not with

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visible film but with x-ray or gamma-ray

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film

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san francisco that is those elements

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that are near the bottom of the human's

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periodic table if that means anything to

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you

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and this should actually be so that's

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the first thing pick an element near the

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bottom of the periodic table both of

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which is lead and mercury are

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don't pick boron or carbon or something

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up near the top of the table all right

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that's a gross

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judgment

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now once having done that you can you

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can pick those ones at the bottom and