Decide if the sentences below are true (T) , false (F) or does not say (DNS) . 1. The Telharmonium was invented belore the radio____. 2. Thaddeus Cahill destroyed the final model of his invention before he died___. 3. The Rejuvenator successfully cured deafness and baldness in hundreds of people____. 4. The Rejuvenator was a commercial success even though it was not clear how it worked___. 5. The Writing Ball was the first machine that Used electricity for typing___. 6. Other typing machines were cheaper to make because they were not made by hand___. 7. The Antikythera Mechanism was at the bottom of the sea for nearly 2000 yesrs____. 8. For about 70 years after it was found, the purpe of the mechanism was not known___.