While the Library is not aware of any . copyright protection (see Title 17, .) or any other restrictions in the materials in the Inventing Entertainment: The Motion Pictures and Sound Recordings of the Edison Companies, there may be content protected as "works for hire" (copyright may be held by the party that commissioned the original work) and/or under the copyright or neighboring-rights laws of other nations. The Library is anxious to hear from individuals or institutions that have information about these materials or know of their history.
*Must be 18+ & 50 US/DC res. From 1/16/17 - 2/16/17, purchase any Galaxy S8, Galaxy S8+, Galaxy S7 Active, or Note8, (Offer excludes all Sprint carrier devices) on or Shop Samsung App (“Qualifying Purchase”) and get Free AKG Wireless Headphones (EO-Y50BTBLKAKG-PROMO). Gifts will automatically be added to your cart and price will automatically be reduced to zero for the Gift in the cart. Must check out with both Qualifying Purchase and Gift in the same transaction. Gift may be shipped separately. If Qualifying Purchase is returned, customer will forfeit right to receive Gift or, if customer has already received Gift, will be charged for retail price of Gift on the form of payment used to make Qualifying Purchase. Offer valid 1/16/17 - 2/16/17 only, or while supplies last, whichever is sooner. Limit one Gift per Qualifying Purchase. Offer cannot be combined with any other rebate, offer or discount. Taxes, shipping fees and other costs may apply.
If you've ever played with magnets, you know that opposite poles attract and like poles repel each other. This is the basic principle behind electromagnetic propulsion. Electromagnets are similar to other magnets in that they attract metal objects, but the magnetic pull is temporary. As you can read about in How Electromagnets Work , you can easily create a small electromagnet yourself by connecting the ends of a copper wire to the positive and negative ends of an AA, C or D-cell battery . This creates a small magnetic field. If you disconnect either end of the wire from the battery, the magnetic field is taken away.