Popular SciencePopular Science gives our readers the information and tools to improve
their technology and their world. The core belief that Popular
Science and our readers share: The future is going to be better, and
science and technology are the driving forces that will help make it
better. |
多く使われている語句
adjusted aerial aeroplane alternating current antenna apparatus attached battery binding post blade bolts brass brush canals capacity circuit clouds coil compartment condenser connected construction cylinder detector device diameter direct current door drawing drill driving earth electric fastened feet Flagstaff gasoline engine guns Hans Schuler heavy holes hook horse power hundred ice-house inches inductance installation insulated iron Josef Hoffman lamp light machine magnet manufacture Mars Mazatlan ment metal miles motor mounted Navy Niagara nuts operation ordinary oscillation Pensacola photograph piece pipe placed plant pole radio receiving Roger Babson rope screw semaphore ship shock absorber shown in Fig shows side signals sliding snow spark gap speed spring station steam steel storage room surface switch thousand tion tire traction engine trees tube turn variometer wave length wheel Wilhelm Ostwald wind wire wireless wood