Boiling can be seen without the help of a thermometer, and by this time, the water is disinfected. Though the boiling point decreases with increasing altitude, it is not enough to affect the disinfecting process. "Boiling" is the method of cooking food in boiling water or other water-based liquids such as stock or milk. Simmering is gentle boiling, while in poaching the cooking liquid moves but scarcely bubbles. The boiling point of water is typically considered to be 100 °C or 212 °F. Pressure and a change in the composition of the liquid may alter the boiling point of the liquid.
Stone boiling the wind cooled above-ground containers before the rocks could efficiently heat the water which made the already fuel-intensive process less effective and viable. At Head-Smashed-In Buffalo Jump in what is now Alberta, Canada, bison hides were used to line pits that held the water. Indigenous peoples’ use of stone boiling involved heating stones in or near a hearth or fire before the rocks were transferred to a nearby water-filled container by using forked sticks. The rocks would then be removed from the container by using those forked sticks and bracing the stones to the side of the container. Rocks used