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.
Wittman is a licensed nurse and studied nursing at Arizona State University. Castor oil can be used to treat acne. Photo Credit FikMik/iStock/Getty Images. Castor oil has been used for centuries as a home remedy to treat a variety of medical conditions, according to Foundations of Nursing..