| How the historian proves a hypothesis |
|
|
|
|
|
|
| How the historian decides what is fact |
|
|
|
|
|
|
| How the historian deals with mind set |
|
|
|
|
|
|
| How the historian classifies information |
|
|
|
|
|
|
| How the historian asks questions |
|
|
|
|
|
|
| How the first letter was written |
|
|
|
|
|
|
| How the eye functions |
|
|
|
|
|
|
| How The Ear Functions. |
1941 |
Karl Kurt Bosse; Knowledge Builders |
11 min |
16mm |
B&W |
sound |
| How television works |
|
|
|
|
|
|
| How talkies talk |
|
|
|
|
|
|
| How sugar is refined |
|
|
|
|
|
|
| How solid is rock? |
|
|
|
|
|
|
| How seeds are scattered |
|
|
|
|
|
|
| How seeds are made |
|
|
|
|
|
|
| How safe is surgery? |
|
|
|
|
|
|
| How raw sugar is made from cane |
|
|
|
|
|
|
| How precise is precise |
|
|
|
|
|
|
| How plants move |
|
|
|
|
|
|
| How plants help us: observing things around us |
|
|
|
|
|
|
| How plants feed |
|
|
|
|
|
|
| How pine trees reproduce |
|
|
|
|
|
|
| How our two party system operates |
1960 |
Cinecraft Productions |
20 min |
16mm |
B&W |
Sound |
| How much land does a man need? |
|
|
|
|
|
|
| How much is enough |
|
|
|
|
|
|
| How much does the earth weigh?: measurement and mass |
|
|
|
|
|
|
| How much cooperation? |
|
|
|
|
|
|
| How much affection? |
|
|
|
|
|
|
| How motion pictures move and talk |
1937 |
Bell & Howell Company |
10 |
16mm |
B&W |
sound |
| How Mole got his trousers |
|
|
|
|
|
|
| How many stars |
|
|
|
|
|
|
| How many members in a set |
|
|
|
|
|
|
| How long is a minute? |
|
|
|
|
|
|
| How lightning shatters wood : the primeaval steam engine |
|
|
|
|
|
|
| How life begins |
|
|
|
|
|
|
| How level is sea level |
|
|
|
|
|
|
| How its surface changes |
1956 |
Coronet Films |
10 min |
|
B&W |
|
| How it works |
|
|
|
|
|
|
| How it happens |
|
|
|
|
|
|
| How it happened |
|
|
|
|
|
|
| How insects help us |
|
|
|
|
|
|
| How green plants make and use food. - Rev. ed. |
|
|
|
|
|
|
| How good is a 'good guy'? |
|
|
|
|
|
|
| How fibres are spun |
|
|
|
|
|
|
| How far how soon? (TEFC) |
|
|
|
|
|
|
| How electricity is produced |
|
|
|
|
|
|
| How Effective Is Your Reading? |
1951 |
Coronet Films |
11 |
16mm |
Color |
sound |
| How does it feel? |
|
|
|
|
|
|
| How does a rainbow feel? |
|
|
|
|
|
|
| How does a computer work? |
|
|
|
|
|
|
| How does a candle burn? |
|
|
|
|
|
|