On coming to Siam from Manila, I brought with me as an inheritance from my study of amebiasis a desire to know something of the prevalence of that disease in my new abiding place. Accordingly my first questions were devoted to this subject. I was naturally astonished at being informed that this disease is infrequent, although I discovered that at least two Europeans in the small colony had suffered from abscess of the liver.
In order to satisfy myself more completely, I obtained permission from the minister of justice to visit the government prison at Bangkok, and, through the kindness of the attending physician of this prison, Dr. Adamsen, to make a series of examinations of the stools of prisoners. I was naturally disappointed in having access for examination only to the prisoners confined in the prison hospital, for such observations as I should be able to make would, under