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So given what we know so far about gem fabrials what sort of practical technology do think could be made and how would you do it? Practically the MOST important invention of note so far has been the Smokestone Clock. In modern technology timing is everything! More Later. 1st off - Long Range Walkie-Talkies. Even though Brandon Sanderson sad that voice communications wont occur for a while, I would tend to think that its more of a cultural problem rather than current ability. Ironically the problem is a lack of tin cans. If you have cans sooner or later some enterprising kid invents the 2 cans and a string walkie-talkie. If you think about it that's all you really need. The spanreed fabrials react to motion! So 2 small drums attach a split ruby to the center of each drum head and speak. Your voice causes the drum head to vibrate your half of the ruby. The receiving ruby then vibrates the receiving drum head. The rubies are simply replacing the string. And drum heads vibrate nicely. That's all that older telephones used to do. Your voice vibrated a diaphragm connected to a magnet which sent an electrical signal down the line. And after this: 'Telephone' operators (ala Tashek)... And with that smokestone timing. Soooooo much more... 2nd - Motors. Two possibilities here depending on the route you want your tech to take: Steam Engine. Again all of the technology is there. Heat source is the Heating Fabrials. Gearing - any one who can make the gearing for watches can certainly make the gearing for the pistons and gears and brakes on a locomotive. And you don't even need to weld or forge the parts, just carve or mold them and soulcast them to iron. And Roshar certainly has enough water. Electric Motors. OK bit trickier but possible. Again probably large to start off with but picture this. A low sidded metal tub, the center of which is connected to your drive shaft (or substitute) In the Tub are 4 rods forming a X, made of two different types of metal. (Ex copper, tin, copper, tin) OK, using Attractors and Repellers. The tub is fitted with bearings over a stationary hub At 4 locations around the hub are sets of attractors/repellers. Two sets to attract/repel copper and two sets for tin. Engage the fabrials as two spoke approach it attractor as its turned off and as the spoke passes its repelled. So you wind you with a constant push/pull within the tub which in turn then turns the drive shaft. And how is all of this controlled so precisely? Timing. This could definitely be refined but hopefully you get the concept. SO WHAT DO YOU MAD GENIUSES SEE AS POSSIBLE AND HOW WOULD YOU ACCOMPLISH IT?