How to InventMacmillan, 1977 - Počet stran: 173 Contents: Preface - 1. What is 'invention' and can it be taught? - 2. Some historic inventions and inventors - 3. What needs inventing? - 4. The art of the inventor - 5. Physical thinking - 6. Engineering and nature study - 7. Thinking with the hands - 8. Teaching invention - 9. Developing and patenting an invention - 10. Some of our inventions - Epilogue - Appendix: 3-D crossword - Index - |
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Strana 18
... coal was volatile and the vapours were inflammable . Murdoch heated coal in a kettle and burnt the vapours on a perforated thimble . In 1792 he lit his own house by gas ; he used coal gas from a bladder for a lantern . In 1802 he gave ...
... coal was volatile and the vapours were inflammable . Murdoch heated coal in a kettle and burnt the vapours on a perforated thimble . In 1792 he lit his own house by gas ; he used coal gas from a bladder for a lantern . In 1802 he gave ...
Strana 38
... coal to produce gas in situ and many experiments have been done on this , but it is very difficult to make good producer gas , even in a specially designed gas producer fed with sized coal , so it is certainly not an efficient way of ...
... coal to produce gas in situ and many experiments have been done on this , but it is very difficult to make good producer gas , even in a specially designed gas producer fed with sized coal , so it is certainly not an efficient way of ...
Strana 39
... coal reserves of Britain were calculated to be enough to pro- vide us with two hundred million tons a year for two hundred and fifty years . Now the Coal Board says we have enough to provide us ( by conventional mining techniques ) with ...
... coal reserves of Britain were calculated to be enough to pro- vide us with two hundred million tons a year for two hundred and fifty years . Now the Coal Board says we have enough to provide us ( by conventional mining techniques ) with ...
Obsah
W THRING | 44 |
Physical thinking | 72 |
Engineering and nature study | 80 |
Autorská práva | |
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