and contains 25 catties of rice, and 36 kanchoen make a cartload .
We learn from another part of Laos an interesting fact which also throws some light on the development of the larger weight units from measures of capacity. For since in some parts of that country the cocoanut is used as the measure of capacity, and as neal, the native Cambodian name for the catty, means simply a cocoanut, it looks as though this was the real origin of the catty universally employed over all Further Asia. This likewise gives us the reason why the catty of silver is twice the weight of a catty of rice. If a weight unit is derived from a measure of capacity, according to the nature of the substance or liquid with which the measure is filled, the weight unit derived will be heavier or lighter, just as the Irish barrel of wheat is 6 stones heavier than the barrel of oats. A cocoa-nut, or bamboo-joint filled with silver will give a far heavier weight unit than if it is weighed when filled with rice.