646 Philippine Journal of Science 
ADDENDUM 
As the final proof of this paper is being read, I am in receipt 
of a letter from Doctor Mason concerning the case of balan- 
tidiosis he treated with chenopodium in which he says: 
I saw my patient six months after treatment and he had had no return 
then. But I have since heard indirectly that he had a dysentery. This 
was a lay diagnosis. I sent him some chenopodium with instructions for 
its use. He wrote me later that he was well, but whether with or without 
treatment I do not know. I will write to him asking for a statement of 
his health since the first attack, and when I receive that I will send it to 
you. 
REFERENCES 
1. HAUGHWoUT, FRANK G.; LANTIN, PEDRO T.; and AsuZANO, M. A. 
Protozodlogic and clinical studies on the treatment of protozoal dys- 
_ entery with benzyl benzoate. I. A preliminary report on eight cases 
of endamebic dysentery and one case of bacillary dysentery treated 
at the Philippine General Hospital. Arch. Int. Med. 24 (1919) 383. 
2. Macut, Davip I. A pharmacological and therapeutic study of some 
benzyl esters. Journ. Pharm. & Exper. Therap. 11 (1918) 419. 
8. Macut, Davin I., and FisHER, Homer G. On the toxic action of opium 
alkaloids individually and in combination with each other on Para- 
mecia. Journ. Pharm. & Exper. Therap. 10 (1917) 95. 
4. Mason, C. W. A case of Balantidium coli dysentery. Journ. Para- 
sitol. 5 (1919) 187. 
