a refinery using the orford process was built in port colborne, ontario in 1918 and then moved to copper cliff, ontario, where that technique was replaced by the matte flotation process in 1948. hard rock gold mining became practical in 1887, with the development of the potassium cyanidation process, by scott macarthur, which was used to separate the gold from the ore.
sample of intermetallic titanium aluminide, used to make turbine blades, developed by the irc in materials processing at the university of birmingham, 2007 sample of nickel aluminide powder, used as a catalyst for hydrogen fuel cells, developed and made by ceram,.
gold pomander, in the form of a rose, the head hinges back to reveal cavity containing a sponge and perforated base, loop at end of stalk for suspension, by h.w.d., hallmarked in london, 1868 sample of shredded tyre crumbs, 1996, made by monarch tyres.
the density more precisely, the volumetric mass density; also known as specific mass , of a substance is its mass per unit volume.the symbol most often used for density is ρ the lower case greek letter rho , although the latin letter d can also be used. mathematically, density is defined as mass divided by volume: = where ρ is the density, m is the mass, and v is the volume.
phosphoric acid is commonly encountered in chemical laboratories as an 85% aqueous solution, which is a colourless, odourless, and non-volatile syrupy liquid. although phosphoric acid does not meet the strict definition of a strong acid, the 85% solution can still severely irritate the skin and damage the eyes.