Seam allowance
Seam allowance is added in the edges of patterns so that you can sow different piece together.
Seam allowance ranges as per recommnended amount for that garment as to what size it would be to fit… on the sewing machine, the numbers engraved on the metal indicate the scales to use as an amount of seam allownance for patterns.
The basic google example of seam allowance is copies as follows: “Seam allowance (sometimes called inlays) is the area between the edge and the stitching line on two (or more) pieces of material being stitched together. Seam allowances can range from 1⁄4 inch (6.4 mm) wide to as much as several inches. Commercial patterns for home sewers have seam allowances ranging from 1⁄4 to 5⁄8 inch (6.4 to 15.9 mm).”
This entails about the different intervals on the machine that range to opt a perfect reasonable size to a certain garment one is making.
Litre of light
Litre of light is mostly use in poor areas where houses are built next to each other, they use liter empty bottles as a source of light (globe) to brighten their homes by punching a hole on a metal roofing fitting in the bottle in that hole and applying a sealant to make the bottle stable to the rooftop.Then adding water and bleach to the bottle –and attatching the bottle in the roof to make a sort of globe-like object inside the house, as so when it is dark, the bottle will give light inside the house. This is the easiest and cheapest alternative for saving energy.
Straw of light
Straw of light in one of the earliest and natural ways used in building houses. It is a natural building material used to infill between a wooden frame in a timber framed building using a combination of clay and straw, woodchips or some other lighter material.