all you need to do is to hook up a simple detonation device with a few batteries, a switch, and some wire. Remember, though it is essential that the two charges, one on each side of the casing, go off at once. Now put the whole thing in the casing of an old Hoover vacuum cleaner, and you're finished with this part of the process. The rest is easy. A word to the wise about wastes : After your A-bomb is completed, you'll have a pile of moderately fatal radioactive wastes like U-238. These are not dangerous, but you do have to get rid of them. You can flush leftovers down the toilet (don't worry about polluting the ocean; there is already so much radioactive waste there, a few more bucketfulls won't make waves), or if you're the fastidious type -- bury it in the back yard -- just like Uncle Sam does. If the neighbors' kids have a habit of trampling the lawn, tell them to play over by the waste. You'll soon find that they're spending most of their time in bed. Make THREE more A-bombs, following the directions above . 3. Assembling Your H-bomb. The heard of the H-bomb is the fusion process. Several A-bombs are detonated in such a way as to create the extremely high temperature (100 million degrees C.) necessary to fuse lithium deuteride (LiD) into helium. When the lithium nucleus slams into the deuterium nucleus, two helium nuclei are created, and if this happens to enough deuterium nuclei rapidly enough the result is an enormous amount of energy, the energy of the H-bomb. Lithium deuteride can be purchased from any chemical-supply house. It costs $1,000 a pound. If your budget won't allow it, you can substitute lithium hydride at $40 a pound. You will need at least 100 pounds: It's a corrosive and toxic powder, so be careful. Place the lithium deuteride or hydride in glass jars and surround it with four A-bombs in their casings. Attach each one to the same detonator so that they will go off simultaneously. The container for the whole thing is no problem. They can be placed anywhere (inside an old stereo console, a discarded refrigerator, etc.). When the detonator sets off the four A-bombs, all eight hemispheres of fissionable material will slam into each other at the same time, creating four critical masses and four detonations. This will raise the temperature of the lithium deuteride to 100 million degrees C.