The total rainfall has been as high as 114 inches in one year.
Yellow fever appears to be unknown.

The diseases most fatal among the natives are cholera and smallpox, both of which are brought from China.

Low malarial fever is brought on by sleeping on the ground or being chilled by remaining, without exercise, in wet clothes; and diarrhea is produced by drinking bad water or eating excessive quantities of fruit.

Almost all of these diseases are preventable by proper precautions, even by troops in campaign.

The sickness in our troops was very small, much less than in the cold fogs at camp in San Francisco.
Mineral Wealth.
Very little is known concerning the mineral wealth of the islands.