A plumb-line can be made of steel, metal, gold or wood
Hydrometers can be made of many, various substances. Brewers hydrometers used professionally, are made of brass. Ones used for aquariums have been made of plastic. The popular, general purpose, kind used in laboratories, would probably be made of glass. Glass is cheap and easy to be made and does not react with many chemicals.
silica
They are used for medicine in radiation therapy for certain types of cancer.
pigments
its called recycling
Plumblines ensure equipment is vertically 'true' - increasing the accuracy of measurements.
planet earth
The football used to be made by pigskin. Now it is made from leather or other things.
usually it used to be made out of copper and some times alliminium but now it is made out of plastic.
it is made of used condoms. lol but its true really
They were made out of sand.
they are made out of used materials
What is glycine made from
Recycled toilet paper is made from used paper. It isn't made from used toilet paper. That would be gross.
they used sticks,mud,and grass
I think it was made in c.AD100; used by the vikings.
The piccolo used to be made of wood, and although most piccolos today are still made of wood, many can be made of a variety of metals such as silver, platinum and nickel.