w/w- an abbreviation for by weight, used in chemistry and pharmacology to describe the concentration of a substance in a mixture or solution. Properly speaking, 2% w/w means that the mass of the substance is 2% of the total mass of the solution or mixture. The metric symbol g/g has the same meaning as w/w.
Midlothian's old motto. Midlothian is a city in northwest Ellis County, Texas, United States. The city is 5 miles (8.0 km) southwest of Dallas. It is the hub for the cement industry in North Texas as it is the home to three separate cement production facilities, as well as a steel mill.
Located to the south of Edinburgh, Midlothian is a beautifully rural area, complete with rolling green hills & huge expanses of thriving woodland. Its boundaries are marked by the Pentland Hills chain to the west and the Moorfoot Hills to the south. Brilliant attractions.