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*No. 19. — A method for inoculating animals with precise amounts. By M. J. 
Rosenau. 
*No. 20. — A zoological investigation into the cause, transmission, and source of 
Rocky Mountain “spotted fever.” By Ch. Wardell Stiles. 
No. 21. — The immunity unit for standardizing diphtheria antitoxin (based on 
Ehrlich’s normal serum). Official standard prepared under the act approved July 
1, 1902. By M. J. Rosenau. 
*No. 22. — Chloride of zinc as a deodorant, antiseptic, and germicide. By T. B. 
McClintic. 
*No. 23. — Changes in the Pharmacopoeia of the United States of America. Eighth 
Decennial Revision. By Reid Hunt and Murray Galt Motter. 
No. 24. — The International Code of Zoological Nomenclature as applied to medi- 
cine. By Ch. Warded Stiles. 
No. 25. — Illustrated key to the cestode parasites of man. By Ch. Warded Stiles. 
No. 26. — On the stability of the oxidases and their conduct toward various reagents. 
The conduct of phenolphthalein in the animal organism. A test for saccharin, and 
a simple method of distinguishing between cumarin and vanillin. The toxicity of 
ozone and other oxidizing agents to lipase. The influence of chemical constitution 
on the lipolytic hydrolysis of etheral salts. By J. H. Kastle. 
*No. 27. — The limitations of formaldehyde gas as a disinfectant with special refer- 
ence to car sanitation. By Thomas B. McClintic. 
*No. 28. — A statistical study of the prevalence of intestinal worms in man. By 
Ch. Warded Stiles and Philip E. Garrison. 
*No. 29. — A study of the cause of sudden death following the injection of horse 
serum. By M. J. Rosenau and John F. Anderson. 
No. 30. — I. Maternal transmission of immunity to diphtheria toxine. II. Mater- 
nal transmission of immunity to diphtheria toxine and hypersusceptibility to horse 
serum in the same animal. By John F. Anderson. 
No. 31. — Variations in the peroxidase activity of the blood in health and disease. 
By Joseph H. Kastle and Harold L. Amoss. 
No. 32. — A stomach lesion in guinea pigs caused by diphtheria toxine and its 
bearing upon experimental gastric ulcer. By M. J. Rosenau and John F. Anderson. 
No. 33. — Studies in experimental alcoholism. By Reid Hunt. 
No. 34. — I. Agamofilaria georgiana n. sp., an apparently new roundworm parasite 
from the ankle of a negress. II. The zoological characters of the roundworm genus 
Filaria Mueller, 1787. III. Three new American cases of infection of man with 
horse-hair worms (species Paragordius varius ), with summary of all cases reported to 
date. By Ch. Wardell Stiles. 
*No. 35. — Report on the origin and prevalence of typhoid fever in the District of 
Columbia. By M. J. Rosenau, L. L. Lumsden, and Joseph H. Kastle. (Including 
articles contributed by Ch. Wardell Stiles, Joseph Goldberger, and A. M. Stimson.) 
No. 36. — Further studies upon hypersusceptibility and immunity. By M. J. 
Rosenau and John F. Anderson. 
No. 37. — Index-catalogue of medical and veterinary zoology. Subjects: Trema- 
toda and trematode diseases. By Ch. Wardell Stiles and Albert Hassall. 
No. 38. — The influence of antitoxin upon post-diphtheritic paralysis. By M. J. 
Rosenau and John F. Anderson. 
No. 39. — The antiseptic and germicidal properties of solutions of formaldehyde 
and their action upon toxines. By John F. Anderson. 
No. 40. — 1. The occurrence of a proliferating cestode larva ( Sparganum proliferum ) 
in man in Florida, by Ch. Wardell Stiles. 2. A reexamination of the type specimen 
of Filaria restiformis Leidy, 1880 =Agamomermis restiformis, by Ch. Wardell Stiles. 
3. Observations on two new parasitic trematode worms: Homalogaster philippinensis 
