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Apap Wrote:
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> Looks like magnesium to me-

That one was probably flash powder or wire.. The Edgar brothers photos were probably magnesium ribbon or possibly very early magnesium flash bulbs. The Rutherford photos of the 1950's were certainly magnesium flash bulbs.

The first and earliest flash up until about the end of the 19th century was flash powder.
Flash powder was replaced by magnesium ribbon (higher intensity light), Magnesium wire didn't offer significant advantages over powder and was much more expensive, Ribbon was cheaper to produce, which in turn was replaced by magnesium ribbon inside a disposable bulb (more convenient use), a flash bulb. Which was in turn replaced in the 1960's by xenon electronic flash, which we still use today.
Magnesium ribbon, and magnesium flash bulbs were quite expensive and single use, one pop only, so any flash photography was quite a big deal. Even in the 1950's.





Edited 1 time(s). Last edit at 18-Aug-17 23:17 by Jon Ellison.

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Water marks on King's Chamber shaft opening 1534 Romulus the 2nd 13-Aug-17 14:57
Re: Water marks on King's Chamber shaft opening 254 Thanos5150 13-Aug-17 15:58
Re: Water marks on King's Chamber shaft opening 247 Romulus the 2nd 13-Aug-17 16:14
Re: Water marks on King's Chamber shaft opening 222 Jon Ellison 13-Aug-17 16:25
Re: Water marks on King's Chamber shaft opening 189 Romulus the 2nd 13-Aug-17 16:32
Re: Water marks on King's Chamber shaft opening 172 Jon Ellison 13-Aug-17 16:41
Re: Water marks on King's Chamber shaft opening 149 Romulus the 2nd 13-Aug-17 16:38
Re: Water marks on King's Chamber shaft opening 154 Jon Ellison 13-Aug-17 16:52
Re: Water marks on King's Chamber shaft opening 151 Romulus the 2nd 13-Aug-17 16:58
Re: Water marks on King's Chamber shaft opening 164 Jon Ellison 13-Aug-17 17:06
Re: Water marks on King's Chamber shaft opening 126 Thanos5150 14-Aug-17 20:04
Re: Water marks on King's Chamber shaft opening 187 Thanos5150 13-Aug-17 18:31
Re: Water marks on King's Chamber shaft opening 164 Romulus the 2nd 13-Aug-17 21:24
Re: Water marks on King's Chamber shaft opening 154 Thanos5150 13-Aug-17 23:57
Re: Water marks on King's Chamber shaft opening 143 Romulus the 2nd 14-Aug-17 08:53
Re: Water marks on King's Chamber shaft opening 139 Jon Ellison 14-Aug-17 10:06
Re: Water marks on King's Chamber shaft opening 95 Romulus the 2nd 14-Aug-17 22:38
Re: Water marks on Queen's Chamber 145 Howard West 13-Aug-17 23:59
Re: Water marks on Queen's Chamber 148 Jon Ellison 14-Aug-17 00:40
Re: Water marks on Queen's Chamber 113 Howard West 14-Aug-17 14:59
Re: Water marks on Queen's Chamber 96 D-Archer 15-Aug-17 10:35
Re: Water marks on Queen's Chamber 90 Origyptian 15-Aug-17 13:41
Re: Water marks on Queen's Chamber 84 D-Archer 15-Aug-17 14:13
Re: Where the salt water came from 106 Howard West 15-Aug-17 14:44
Re: Water marks on Queen's Chamber 74 Origyptian 15-Aug-17 16:23
Re: Water marks on King's Chamber shaft opening 137 Thunderbird 14-Aug-17 00:48
Re: Water marks on King's Chamber shaft opening 78 gulsbo 15-Aug-17 16:24
Re: Water marks on King's Chamber shaft opening 99 Origyptian 15-Aug-17 16:55
Re: Water marks on King's Chamber shaft opening 82 Romulus the 2nd 16-Aug-17 22:46
Re: Water marks on King's Chamber shaft opening 118 M. J. Thomas 14-Aug-17 09:16
Re: Water marks on King's Chamber shaft opening 99 Merrell 14-Aug-17 11:34
Re: Water marks on King's Chamber shaft opening 105 Romulus the 2nd 14-Aug-17 12:03
Re: Water marks on King's Chamber shaft opening 83 M. J. Thomas 14-Aug-17 16:05
Re: Water marks on King's Chamber shaft opening 88 Origyptian 14-Aug-17 17:30
Re: Water marks on King's Chamber shaft opening 79 M. J. Thomas 14-Aug-17 19:00
Re: Water marks on King's Chamber shaft opening 87 Origyptian 14-Aug-17 20:33
Re: Water marks on King's Chamber shaft opening 81 M. J. Thomas 14-Aug-17 22:31
Re: Water marks on King's Chamber shaft opening 80 Jon Ellison 14-Aug-17 23:12
Re: Water marks on King's Chamber shaft opening 80 Origyptian 14-Aug-17 23:40
Re: Water marks on King's Chamber shaft opening 79 Jon Ellison 15-Aug-17 00:12
Re: Water marks on King's Chamber shaft opening 102 M. J. Thomas 15-Aug-17 00:45
Re: Water marks on King's Chamber shaft opening 96 Jon Ellison 15-Aug-17 07:54
Re: Water marks on King's Chamber shaft opening 86 Origyptian 15-Aug-17 13:36
Re: Water marks on King's Chamber shaft opening 78 Origyptian 14-Aug-17 23:25
Re: Water marks on King's Chamber shaft opening 65 Jon Ellison 14-Aug-17 23:39
Re: Water marks on King's Chamber shaft opening 94 cladking 15-Aug-17 00:59
Re: Water marks on King's Chamber shaft opening 107 Jon Ellison 14-Aug-17 12:51
Re: Water marks on King's Chamber shaft opening 89 Romulus the 2nd 14-Aug-17 14:13
Re: Water marks on King's Chamber shaft opening 114 Thunderbird 15-Aug-17 01:18
Re: Water marks on King's Chamber shaft opening 94 Origyptian 14-Aug-17 15:57
Re: Water marks on King's Chamber shaft opening 98 cladking 14-Aug-17 17:31
Re: Water marks on King's Chamber shaft opening 69 Jon Ellison 14-Aug-17 19:08
Re: Water marks on King's Chamber shaft opening 73 Origyptian 14-Aug-17 20:40
Re: Water marks on King's Chamber shaft opening 102 Thanos5150 14-Aug-17 16:37
Re: Water marks on King's Chamber shaft opening 93 Origyptian 14-Aug-17 17:52
Re: Water marks on King's Chamber shaft opening 83 M. J. Thomas 14-Aug-17 20:08
Re: Water marks on King's Chamber shaft opening 64 Origyptian 14-Aug-17 20:44
Re: Water marks on King's Chamber shaft opening 95 Thanos5150 14-Aug-17 21:00
Re: Water marks on King's Chamber shaft opening 95 Romulus the 2nd 14-Aug-17 22:41
Re: Water marks on King's Chamber shaft opening 76 Jon Ellison 14-Aug-17 22:57
Re: Water marks on King's Chamber shaft opening 76 Origyptian 14-Aug-17 23:32
Re: Water marks on King's Chamber shaft opening 84 Romulus the 2nd 15-Aug-17 12:42
Re: Water marks on King's Chamber shaft opening 95 Origyptian 15-Aug-17 14:29
Re: Water marks on King's Chamber shaft opening 73 Romulus the 2nd 15-Aug-17 15:55
Re: Water marks on King's Chamber shaft opening 81 Origyptian 15-Aug-17 16:38
Re: Water marks on King's Chamber shaft opening 71 Thanos5150 15-Aug-17 21:11
Re: Water marks on King's Chamber shaft opening 76 Romulus the 2nd 15-Aug-17 22:45
Re: Water marks on King's Chamber shaft opening 60 Jon Ellison 15-Aug-17 23:06
Re: Water marks on King's Chamber shaft opening 77 M. J. Thomas 15-Aug-17 15:36
Re: Water marks on King's Chamber shaft opening 75 Romulus the 2nd 15-Aug-17 16:04
Re: Water marks on King's Chamber shaft opening 86 Jon Ellison 15-Aug-17 16:26
Re: Water marks on King's Chamber shaft opening 74 M. J. Thomas 15-Aug-17 19:25
Re: Water marks on King's Chamber shaft opening 78 Origyptian 15-Aug-17 20:09
Re: Water marks on King's Chamber shaft opening 71 M. J. Thomas 15-Aug-17 21:53
Re: Water marks on King's Chamber shaft opening 67 Origyptian 15-Aug-17 22:14
Re: Water marks on King's Chamber shaft opening 74 Jon Ellison 15-Aug-17 20:26
Re: Water marks on King's Chamber shaft opening 61 M. J. Thomas 15-Aug-17 21:24
Re: Water marks on King's Chamber shaft opening 75 M. J. Thomas 15-Aug-17 21:27
Re: Water marks on King's Chamber shaft opening 65 Jon Ellison 15-Aug-17 22:57
Re: Water marks on King's Chamber shaft opening 64 M. J. Thomas 15-Aug-17 23:38
Re: Water marks on King's Chamber shaft opening 76 Origyptian 15-Aug-17 23:04
Re: Water marks on King's Chamber shaft opening 76 M. J. Thomas 15-Aug-17 23:53
Re: Water marks on King's Chamber shaft opening 70 Origyptian 16-Aug-17 00:49
Great Step ‘V-Shape’ Depression 78 Dr. Troglodyte 15-Aug-17 23:45
Re: Great Step ‘V-Shape’ Depression 74 Origyptian 16-Aug-17 00:47
Re: Great Step ‘V-Shape’ Depression 78 Jon Ellison 16-Aug-17 01:05
Re: Great Step ‘V-Shape’ Depression 73 Origyptian 16-Aug-17 03:38
Re: Great Step ‘V-Shape’ Depression 70 Jon Ellison 16-Aug-17 14:03
Re: Great Step ‘V-Shape’ Depression 67 Romulus the 2nd 16-Aug-17 22:17
Re: Great Step ‘V-Shape’ Depression 78 Romulus the 2nd 16-Aug-17 22:44
mise–en–scène 113 Dr. Troglodyte 16-Aug-17 23:29
Re: Water marks on King's Chamber shaft opening 86 Origyptian 14-Aug-17 23:05
Re: Water marks on King's Chamber shaft opening 83 Romulus the 2nd 15-Aug-17 11:34
Re: Water marks on King's Chamber shaft opening 84 Jon Ellison 15-Aug-17 12:16
Re: Water marks on King's Chamber shaft opening 78 Origyptian 15-Aug-17 13:46
Re: Water marks on King's Chamber shaft opening 71 Thanos5150 15-Aug-17 20:57
Re: Water marks on King's Chamber shaft opening 73 Origyptian 15-Aug-17 21:58
Re: Water marks on King's Chamber shaft opening 80 Apap 15-Aug-17 23:33
Re: Water marks on King's Chamber shaft opening 68 Origyptian 16-Aug-17 00:44
Re: Water marks on King's Chamber shaft opening 79 Thanos5150 16-Aug-17 01:13
Re: Water marks on King's Chamber shaft opening 76 Thanos5150 16-Aug-17 01:25
Re: Water marks on King's Chamber shaft opening 87 Thanos5150 16-Aug-17 01:31
Re: Water marks on King's Chamber shaft opening 85 Origyptian 16-Aug-17 03:47
Re: Water marks on King's Chamber shaft opening 89 Thanos5150 16-Aug-17 04:41
Re: Water marks on King's Chamber shaft opening 72 Origyptian 16-Aug-17 12:29
Re: Water marks on King's Chamber shaft opening 96 Thanos5150 16-Aug-17 14:30
Re: Water marks on King's Chamber shaft opening 78 Jon Ellison 16-Aug-17 13:01
Re: Water marks on King's Chamber shaft opening 112 Romulus the 2nd 16-Aug-17 21:03
Re: Water marks on King's Chamber shaft opening 88 eyeofhorus33 17-Aug-17 17:27
Re: Water marks on King's Chamber shaft opening 86 cladking 17-Aug-17 18:09
Re: Water marks on King's Chamber shaft opening 108 eyeofhorus33 17-Aug-17 19:12
Re: Water marks on King's Chamber shaft opening 90 cladking 17-Aug-17 21:43
Re: Water marks on King's Chamber shaft opening 83 Romulus the 2nd 17-Aug-17 23:18
Re: Water marks on King's Chamber shaft opening 61 Origyptian 18-Aug-17 16:42
Re: Water marks on King's Chamber shaft opening 66 Jon Ellison 18-Aug-17 16:56
Re: Water marks on King's Chamber shaft opening 61 Romulus the 2nd 18-Aug-17 19:44
Re: Water marks on King's Chamber shaft opening 65 Origyptian 18-Aug-17 20:04
Re: Water marks on King's Chamber shaft opening 73 Jon Ellison 18-Aug-17 20:44
Re: Water marks on King's Chamber shaft opening 63 Origyptian 18-Aug-17 21:07
Re: Water marks on King's Chamber shaft opening 62 Thanos5150 18-Aug-17 22:10
Re: Water marks on King's Chamber shaft opening 73 Apap 18-Aug-17 22:35
Re: Water marks on King's Chamber shaft opening 64 Jon Ellison 18-Aug-17 23:05
Re: Water marks on King's Chamber shaft opening 65 Thanos5150 18-Aug-17 23:30
Re: Water marks on King's Chamber shaft opening 69 Apap 18-Aug-17 23:32
Re: Water marks on King's Chamber shaft opening 71 Jon Ellison 18-Aug-17 23:49
Re: Water marks on King's Chamber shaft opening 66 Apap 19-Aug-17 00:03
Re: Water marks on King's Chamber shaft opening 87 Jon Ellison 19-Aug-17 00:08
Re: Water marks on King's Chamber shaft opening 47 Romulus the 2nd 22-Aug-17 10:00
Re: Water marks on King's Chamber shaft opening 47 Jon Ellison 22-Aug-17 11:21
Re: Water marks on King's Chamber shaft opening 46 Jon Ellison 22-Aug-17 11:39
Re: Water marks on King's Chamber shaft opening 47 Romulus the 2nd 22-Aug-17 21:06
Re: Water marks on King's Chamber shaft opening 66 Origyptian 22-Aug-17 12:02
Re: Water marks on King's Chamber shaft opening 45 Romulus the 2nd 22-Aug-17 21:15
Re: Water marks on King's Chamber shaft opening 43 Origyptian 23-Aug-17 04:01
Re: Water marks on King's Chamber shaft opening 65 Audrey 23-Aug-17 02:09
Re: Water marks on King's Chamber shaft opening 49 Origyptian 23-Aug-17 04:06
Re: Water marks on King's Chamber shaft opening 134 Jon Ellison 23-Aug-17 08:57
Re: Water marks on King's Chamber shaft opening 72 Jon Ellison 19-Aug-17 00:04
Re: Water marks on King's Chamber shaft opening 68 Origyptian 19-Aug-17 15:34
Re: Water marks on King's Chamber shaft opening 90 Apap 17-Aug-17 18:45
Re: Water marks on King's Chamber shaft opening 101 Romulus the 2nd 18-Aug-17 00:36
Re: Water marks on King's Chamber shaft opening 106 Jon Ellison 18-Aug-17 10:05
Re: Water marks on King's Chamber shaft opening 75 Origyptian 18-Aug-17 17:23
Re: Water marks on King's Chamber shaft opening 71 M. J. Thomas 18-Aug-17 18:22
Re: Water marks on King's Chamber shaft opening 73 Jon Ellison 18-Aug-17 19:12
Re: Water marks on King's Chamber shaft opening 62 Origyptian 18-Aug-17 20:23
Re: Water marks on King's Chamber shaft opening 60 Romulus the 2nd 18-Aug-17 19:49
Re: Water marks on King's Chamber shaft opening 65 Origyptian 18-Aug-17 16:50
Re: Water marks on King's Chamber shaft opening 79 Apap 18-Aug-17 18:05
Re: Water marks on King's Chamber shaft opening 69 Jon Ellison 18-Aug-17 19:20
Re: Water marks on King's Chamber shaft opening 68 Jon Ellison 18-Aug-17 19:58
Re: Water marks on King's Chamber shaft opening 50 Jon Ellison 18-Aug-17 20:28
Re: Water marks on King's Chamber shaft opening 62 Origyptian 18-Aug-17 20:15
Re: Water marks on King's Chamber shaft opening 69 Romulus the 2nd 18-Aug-17 20:16
Re: Water marks on King's Chamber shaft opening 66 Apap 18-Aug-17 22:02
Re: Water marks on King's Chamber shaft opening 70 Origyptian 19-Aug-17 15:10
Re: Water marks on King's Chamber shaft opening 51 Romulus the 2nd 20-Aug-17 21:59
Re: Water marks on King's Chamber shaft opening 81 DUNE 19-Aug-17 12:16
Re: Water marks on King's Chamber shaft opening 90 M. J. Thomas 19-Aug-17 20:54
Re: Water marks on King's Chamber shaft opening 80 Jon Ellison 19-Aug-17 22:04
Re: Water marks on King's Chamber shaft opening 75 DUNE 19-Aug-17 22:51
Re: Water marks on King's Chamber shaft opening 71 Origyptian 19-Aug-17 23:17
Re: Water marks on King's Chamber shaft opening 95 Origyptian 21-Aug-17 03:02
Re: Water marks on King's Chamber shaft opening 115 Jon Ellison 21-Aug-17 09:27
Re: Water marks on King's Chamber shaft opening 64 Origyptian 22-Aug-17 05:21
Re: KC Watertight flooring 66 M. J. Thomas 20-Aug-17 00:46
Re: KC Watertight flooring 61 Origyptian 20-Aug-17 04:00
Re: KC Watertight flooring 51 M. J. Thomas 20-Aug-17 17:34
Re: KC Watertight flooring 99 Jon Ellison 20-Aug-17 07:41
Re: KC Watertight flooring 48 M. J. Thomas 20-Aug-17 17:26
Re: Water marks on King's Chamber shaft opening 79 Apap 18-Aug-17 21:43
Re: Water marks on King's Chamber shaft opening 81 Dr. Troglodyte 18-Aug-17 22:54
Re: Water marks on King's Chamber shaft opening 82 Apap 18-Aug-17 23:51
Re: Water marks on King's Chamber shaft opening 121 Origyptian 19-Aug-17 15:53
Re: Water marks on King's Chamber shaft opening 78 M. J. Thomas 20-Aug-17 00:55
Re: Water marks on King's Chamber shaft opening 84 Origyptian 20-Aug-17 04:15


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