NOUN
- United States electrical engineer who in 1907 patented the first triode vacuum tube, which made it possible to detect and amplify radio waves (1873-1961)
How To Use De Forest In A Sentence
- And it seems admirers have a treat in store this year on Girraween's alpine style heathlands, meadows and high altitude forests.
- Other mammals include forest elephant Loxodonta africana cyclotis (EN), estimated at 3,250 individuals in 1989, now reduced for their meat and ivory from 350 to 2 families, hippotamus Hippopotamus amphibious, forest buffalo Syncerus caffer nanus, leopard Panthera pardus, forest hog Hylochoerus meinertzhageni, bongo Tragelaphus euryceros and seven species of duiker, all taken for food. Kahuzi-Biéga National Park, Democratic Republic of Congo
- 'Now I suppose we can take it, De Forest, that henceforward the Board will administer us direct?' A Diversity of Creatures
- Madam Imbert saw Mrs. Maroney in the evening and told her of the interview with De Forest. The Expressman and the Detective
- August 26, A.D. 2065, the Board, sitting in London, was informed by De Forest that the District of Northern Illinois had riotously cut itself out of all systems and would remain disconnected till the Board should take over and administer it direct. A Diversity of Creatures
- The nymphs sat on the edges of ponds in the Jade Forest with the lounging god of the sun and god of the hunt.
- Forests to reduce noise pollution. 40 - meter - wide forest belt noise can be reduced 10 to 15 decibels.
- Lee de Forest invents the vacuum tube.
- Around the turn of the century, when the nation began setting aside forest reserves, professional foresters debated whether fire was good or bad.
- And it seems admirers have a treat in store this year on Girraween's alpine style heathlands, meadows and high altitude forests.