Great modern inventions
Throughout the nineteenth century, inventors produced simple electric lights. For example, Joseph Swan produced a simple electric light, but, he struggled to maintain a power source and the filament soon burned out when the vacuum was exhausted. It was Thomas Edison who made the lightbulb into a pr...
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| Format: | Knjiga |
| Jezik: | Undetermined |
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New York
Chambers
1991
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| Thư viện lưu trữ: | Trung tâm Học liệu Trường Đại học Cần Thơ |
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