introduction to cathode rays

5:24

3:47

18:08

1:58

3:24

1:18

43:07

6:55

12:31

45:25

2:49

7:07

1:23

11:18

43:22

3:13

11:08

9:38

7:29

1:11

4:59

13:12

8:23

10:07

3:06

14:06

7:44

3:07

10:38

6:46

2:21

1:51

2:08

1:03:05

1:52

1:50

19:41

1:47

22:00

7:27

5:48

17:19

7:40

6:17

27:30

39:21

27:22

18:23

2:56

11:08

8:03

12:14

35:13

16:04

14:24

7:05

6:52

8:10

13:47

9:00