A potometer measures how factors such as light, temperature, humidity, light intensity and wind will affect the rate of transpiration. The main type of potometer is the 'bubble' potometer shown in Figure Figure 6.
Physicians recommended against the practice because they did not want medicines associated with punishment. A heavy dose of castor oil could be used as a humiliating punishment for adults, especially political dissenters. Colonial officials used it in the British Raj (India) to deal with recalcitrant servants. Belgian military officials prescribed heavy doses of castor oil in Belgian Congo as a punishment for being too sick to work.
Castor Oil to Detox the Body. Castor oil is a vegetable oil made from the seed of the castor plant. It has numerous household, beauty, and medicinal uses. One of the most common uses of castor oil is for detoxification. Many people consume castor oil as a detoxification (cleansing the body of toxins) agent and laxative, and even to induce labor.