Misc: Solidified milk fat, especially cows milk, used principally as a food item?

Questions

What colour on black produces the most visible combination?

What colour would one associate with the Spanish volunteer force on the eastern front in the WWII?

What colourless, odourless light gas is used to lift airships?

What common dog breed takes its name from the fact that they were originally bred to hunt a game bird called "woodcocks"?

What company created a computer dubbed Jackintosh?