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.
In modern times, castor oil is used as a laxative to treat constipation, and may also be used to help induce labor. Castor oil is used in many brands of makeup and skin care regimens because it is acts as a moisturizer. The use of these products is one of the most common reasons for applying castor oil to your skin.f you use cosmetic products that contain castor oil, your skin may absorb the other chemicals in the product more quickly than it normally would. If you apply a product that contains a variety of chemicals, including castor oil, on your skin, you may experience adverse reactions from the more rapid absorption.