Magnetic weapons

Jens Nordlunde · 14th February 2005, 06:14 PM

Hi Fearn,

Yes, you are right of course - I should have thought of it, and yes, you are quite right, I was off the topic

.

Jens

Jens Nordlunde · 16th February 2005, 05:20 PM

I have had an interesting mail from one of our new members, whom I would like to welcome to this forum, Dr. Ann Feuerbach. In the mail she told me to take an interest in Archaeomagnetism. I did not know the word, but I do know, try to go on Google and look for the word. This, I am quite sure will interest many of you, and it gives the whole discussion another angle. Happy surfing.

Jens

Rivkin · 16th February 2005, 05:51 PM

Archeomagnetism is using old pottery, iron deposits etc. to study the evolution of the Earth's magnetic field.

Jens Nordlunde · 16th February 2005, 06:46 PM

Thank you Rivkin, I know that you also tried to direct me in that direction - when you mention the cheramics - but I did not understand it at the time - sorry.
None the less - this is a most interesting subject, and I tink that much more forumites should join.
This is not only facinating, it is essential how to find out, how old a thing is - and to prove it. Any collector must be interested to join this discussion!

Jens

Jens Nordlunde · 17th February 2005, 03:53 PM

Another thing which can be related to this subject is, Archaeomagnetism. The first time I heard about it was from Ann Feuerbach, I tried to look for it on Google, and I must say, if you don't know what it is, have a look - it is facinating.

Jens

Mare Rosu · 20th February 2005, 01:45 AM

JENS
I had a very hard time getting these two pictures of the Mysore dagger.
It took several days just to get them. I used two different types of material to show the effect, one was a powder Iron and very rusty, but it did a better job as it was finer and dispersed better the other, which was Zinc coated Iron filings while not rusty it very course and did not disperse as well.
Regardless the compass will start N and then S and back to N and finally S at the very tip of the 12" blade.

Gene

Rivkin · 20th February 2005, 02:00 AM

A fantastic picture. I see that most of the blade is not magnetized at all, but there 4-7 macrodomains, which are magnetized. I would say that there definitely has to be some kind of a structural nonuniformety at these points. What surprises me that these domains are quite big, moreover rather than forming let's say a vortex like structure they are actually very well separated.

For now I would say that there are 4 areas that either cooled much slower than the rest of the blade, or somehow else vastly differ from the rest of the blade.

I'm not surprised to see N/S/N configuration: the interaction in between of these areas is obviously dipole-based, and knowing the fact that is magnetized perpendicular to the line that connects these (I don't really want to confuse people by saing "domains") areas, the most benefitial configuration would indeed be the one with the opposite magnetizations.

I will try to get some other opinions on this image - great stuff, thank you.

20th February 2005, 01:45 AM	#6
Mare Rosu Deceased Join Date: Dec 2004 Location: USA, DEEP SOUTH, GEORGIA, Y'all hear? Posts: 121	Dagger magnetic fields JENS I had a very hard time getting these two pictures of the Mysore dagger. It took several days just to get them. I used two different types of material to show the effect, one was a powder Iron and very rusty, but it did a better job as it was finer and dispersed better the other, which was Zinc coated Iron filings while not rusty it very course and did not disperse as well. Regardless the compass will start N and then S and back to N and finally S at the very tip of the 12" blade. Gene Attached Images

14th February 2005, 06:14 PM	#1
Jens Nordlunde Member Join Date: Dec 2004 Location: Europe Posts: 2,718	Hi Fearn, Yes, you are right of course - I should have thought of it, and yes, you are quite right, I was off the topic . Jens

16th February 2005, 05:20 PM	#2
Jens Nordlunde Member Join Date: Dec 2004 Location: Europe Posts: 2,718	I have had an interesting mail from one of our new members, whom I would like to welcome to this forum, Dr. Ann Feuerbach. In the mail she told me to take an interest in Archaeomagnetism. I did not know the word, but I do know, try to go on Google and look for the word. This, I am quite sure will interest many of you, and it gives the whole discussion another angle. Happy surfing. Jens

16th February 2005, 05:51 PM	#3
Rivkin Member Join Date: Dec 2004 Posts: 655	Archeomagnetism is using old pottery, iron deposits etc. to study the evolution of the Earth's magnetic field.

16th February 2005, 06:46 PM	#4
Jens Nordlunde Member Join Date: Dec 2004 Location: Europe Posts: 2,718	Thank you Rivkin, I know that you also tried to direct me in that direction - when you mention the cheramics - but I did not understand it at the time - sorry. None the less - this is a most interesting subject, and I tink that much more forumites should join. This is not only facinating, it is essential how to find out, how old a thing is - and to prove it. Any collector must be interested to join this discussion! Jens

17th February 2005, 03:53 PM	#5
Jens Nordlunde Member Join Date: Dec 2004 Location: Europe Posts: 2,718	Another thing which can be related to this subject is, Archaeomagnetism. The first time I heard about it was from Ann Feuerbach, I tried to look for it on Google, and I must say, if you don't know what it is, have a look - it is facinating. Jens

20th February 2005, 02:00 AM	#7
Rivkin Member Join Date: Dec 2004 Posts: 655	A fantastic picture. I see that most of the blade is not magnetized at all, but there 4-7 macrodomains, which are magnetized. I would say that there definitely has to be some kind of a structural nonuniformety at these points. What surprises me that these domains are quite big, moreover rather than forming let's say a vortex like structure they are actually very well separated. For now I would say that there are 4 areas that either cooled much slower than the rest of the blade, or somehow else vastly differ from the rest of the blade. I'm not surprised to see N/S/N configuration: the interaction in between of these areas is obviously dipole-based, and knowing the fact that is magnetized perpendicular to the line that connects these (I don't really want to confuse people by saing "domains") areas, the most benefitial configuration would indeed be the one with the opposite magnetizations. I will try to get some other opinions on this image - great stuff, thank you.