 As we all know, this morning we're gathered here primarily for the purpose of the crew being briefed by the students on the two experiments slated to fly on SDS-26. And here with us this morning is Lloyd Bruce, a student, and he's from McDonnell Douglas who's sponsoring him, and he's from St. Louis. Okay, well basically the experiment is very simple. What we're trying to observe is the effects of weightlessness on the grain formation and molecular reorganization of the titanium filaments there. The experiment itself is, again I say it's very simple, what the astronauts will be doing is they'll observe for any discrepancies such as a broken tube or loose wiring or anything like that. And they'll flip up the master switch control, activate it and you'll see the light goes on. This will confirm the continuity of the circuit and what you'll do is flick the master switch and you'll hit the master switch and complete the circuit and if you observe the wire there, it'll deform. You'll maintain this for approximately 20 seconds and that will raise the temperature of the wire up to 882 degrees centigrade. Okay, so we just need to get it above 800 and whatever that is. That's what the wires of the length they are, they were calculated to carry the current and create that temperature. And basically that's it. Again I'd like to thank all the McDonnell Douglas and NASA personnel for all the support they've given me. And just to say if this goes out to any students to try and get involved in it and it's not too hard to make them an experiment, it's really fun and interesting and you meet a lot of people. Let me say something to you. This isn't going to be free for you either. In the astronaut office we enjoy doing this type of experiment because, not because a lot of the times it's Nobel Prize winning type science, but mostly because it involves young people like yourself getting involved very early in the space program and getting a chance to work in the system and getting us a chance to work with folks like you. And we're always impressed with the caliber of students that we get to work with. But we also want you to understand that you have a responsibility now to go back just like you said. I like the words that you use to share your enthusiasm with the rest of your students and your faculty and the people you work with to try and interest more young bright students to get involved in this program because we need all the good folks we can get. We appreciate all the work you're doing too. Charlie here will represent our student who unfortunately cannot be here. As John indicated the purpose is to try to grow crystals in this case of lead iodide along a membrane which will be mounted at the edge where the inner O-ring is on that middle bulkhead. The membrane is actually a copolymer of polyethylene and polypropylene and it's simply there as a kind of an orient or on which crystals can grow. Otherwise they would just grow throughout the solution and probably not get to any significant size and we're hoping to orient the growth on that membrane. Specifically it's an apparatus then with four chambers, membrane in the center, deionized water in these two inner chambers, two valves and then the silver end will contain a lead acetate solution, primarily the source of lead ion, lead 2 plus ion and the right hand compartment as you see it, the blue handle end if you like will contain a potassium iodide solution source of the iodide ions. Just before the 51L flight Rich was off on an internship in New York City at the time they needed to be loaded and now he's being in medical school. I've tried to supervise the construction of the apparatus and he tells me when I'm wrong and things of that sort. I guess that outlines it briefly for you. Are these crystals any color? They are a fairly bright yellow color, yes. They'll be easily distinguishable in their formation. Thanks a lot. So we're actually making a new set of valve stems and so as soon as those are done we'll have two, but both of those from last time. What has changed is they've got larger, purer silver bromide crystals in that gel and that's how they increase their film sensitivity. How they grew them, I cannot for one find out, but that's what happened. Now we're playing that same game, not with visible film, but with x-ray or gamma ray film. That is those elements that are near the bottom of the humus periodic table. So that's the first thing, pick an element near the bottom of the periodic table both of which lead and mercury are. Don't take boron or carbine or something up near the top of the table. That's a gross judgment. Now once having done that you can pick those ones at the bottom and some are a little bit more efficient at diffracting x-rays.