Boris Petrov
Gold and other precious metals refining and prospecting
Wire Expanding by Electric Current
Compression and Expansion of Air
Ice Calorimeter
Fire Piston
Gold Panning at Pine Creek
Nitric Acid
The Cheapest Way Of Getting Sulfuric Acid
Melting Gold with Faithfull Workmate Torch
My Advice For Every Beginner Gold Refiner
Electrons
Another Gold Melting Tip
Preparation of Oxygen - Seven Demonstrations
How to Get Rid of Crows
Осаждение Золота Аскорбиновой Кислотой
Gold Precipitation From Aqua Regia Using Ascorbic Acid
Golden Blizzard
Ducks Synchronised Swimming
Silver Recovery from Compact Discs
Silver Nitrate Reaction With Iron Sulfate And Sodium Chloride.
Preprocessing Chips For Gold Extraction
Melting Gold with Go System MT2055H Fine Flame Tech Torch
Gold Recovery From Gold Plated Bracelets - The First Part
Silver Chloride Reduction By The Action of Light
Identifying Fake Gold Plating
Scrapping Hard Drive For Gold, Palladium and Platinum
Золото, платина и палладий из жёстких дисков
Gold Recovery From Computer Gold Plated Pins - One Of My Own Methods
Золото из импортных радиодеталей - Что собирать?
Золото из компьютера - выгодно ли?
Плавка серебра китайской горелкой