The cervix and vagina are swabbed with dilute acetic acid (vinegar). The solution highlights abnormal areas by turning them white (instead of a normal pink color). Abnormal areas can also be identified by looking for a characteristic pattern
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Colposcopy may also be performed if the cervix looks abnormal during a routine examination. It may also be suggested for women with genital warts and for diethylstilbestrol (DES) daughters
No at no point is gasoline/petrol ever to be ingested. And why would you want to, considering vinegar is cheap, gas is not. Go get yourself some good balsamic Vinegar for the price if a litre of petrol.
The Romans had wine vinegar.
Vinegar is an acid and baking soda is an alkali. If an acid and an alkali react with each other they produce a salt, water and hydrogen gas. the gas produced can be used to inflate the balloon.
Being resourceful, many colonists used a variety of pigments and ash as inks. Soot from the fireplace, crushed berries or crushed and boiled walnut shells and that were preserved with salt and vinegar.