In passive solar building design, windows, walls, and floors are made to collect, store, and distribute solar energy in the form of heat in the winter and reject solar heat in the summer. This is called passive solar design because, unlike active solar heating systems, it does not involve the use of mechanical and electrical devices.[1]
[pinit] I looked on the back of a Magic Eraser package the other day and noticed there werenât any ingredients listed. That seemed very odd to me since just about every cleaning product out there has some kind of ingredient. I did a quick search and found out Magic Erasers are made of a product called melamine foam.
Nairne is now credited with the invention of the rubber eraser. The early rubber erasers were perishable and they didnât become commonly used until after 1839, when Charles Goodyear discovered vulcanization to make rubber more durable. The pencil eraser was invented by Hymen L. Lipman in 1858.