314 
Journal of Agricultural Research 
Vol. XXIX, No. 7 
immitis is so rare in dogs in the vicinity 
of Washington, D. C., that probably 
the few cases found are those of dogs 
from the southern part of the United 
States. 
Dog No. 548; 6.5 kg.; 1.95 cc. of 
above mixture * with one-eighth grain 
of arecoline hydrobromide; no worms 
passed in 4 days; post-mortem, on 
fourth day, 1 ascarid. Combination 
entirely ineffective against ascarids. 
Dog No. 559; 7 kg.; 2.1 cc. of above 
mixture with one-fourth grain arecoline 
hydrobromide; 8 ascarids passed the 
first day; no worms the next three 
days; post-mortem, on fourth day, no 
worms. Combination 100 per cent 
effective against ascarids. 
Dog No. 569; 8.5 kg.; 2.55 cc. of 
above mixture with one-fourth grain 
arecoline hydrobromide; no worms 
passed in four days; post-mortem, on 
fourth day, 98 whipworms. Com¬ 
bination entirely ineffective against 
whipworms. 
Dog No. 564; 13 kg.; 3.9 cc. of 
above mixture; first day, 2 whip¬ 
worms; second day, 25 whipworms; 
third day, 3 whipworms; fourth day, 
negative; post-mortem, on fourth day, 
32 whipworms. Combination 48 per 
cent effective against whipworms. 
Dog No. 591; 16.5 kg.; 4.95 cc. of 
above mixture with one-half grain 
arecoline hydrobromide; first day, 1 
hookworm; second and third days 
negative; fourth day, 112 whipworms; 
post-mortem, on fourth day, 17 whip¬ 
worms. Combination 100 per cent 
effective against hookworms and 87 
per cent effective against whipworms. 
Dog No. 592; 14.5 kg.; 4.35 cc. of 
above mixture 'with one-half grain 
arecoline hydrobromide; animal ap¬ 
peared sick in a few minutes and died 
in a few hours. No post-mortem ex¬ 
amination and no conclusions. 
Dog No. 593; 14.5 kg.; 4.35 cc. of 
above mixture with one-half grain of 
arecoline hydrobromide; no worms 
passed in 4 days; post-mortem, on 
fourth day, 14 whipworms. Com¬ 
bination entirely ineffective against 
whipworms. 
Dog No. 594; 14 kg.; 4.2 cc. of above 
mixture with one-half grain of areco¬ 
line hydrobromide; first day, 1 hook¬ 
worm; second, third, and fourth days 
negative; post-mortem on fourth day 
negative. Combination 100 per cent 
effective against hookworms. 
Dog No. 595; 6 kg.; 1.8 cc. of above 
mixture with one-fourth grain areco¬ 
line hydrobromide; first day, 2 hook¬ 
worms; 128 whipworms; second, third, 
and fourth days negative; post-mortem 
on fourth day negative. Combina¬ 
tion 100 per cent effective against 
hookworms and whipworms. 
Dog No. 596; 13 kg.; 4.2 cc. of 
above mixture with one-half grain of 
arecoline hydrobromide; first day, 3 
hookworms, 2 whipworms; second day, 
1 whipworm; third and fourth days 
negative; post-mortem, on fourth day,. 
1 whipworm. Combination 100 per 
cent effective against hookworms and 
75 per cent effective against whip¬ 
worms. 
Dog No. 600; 10 kg.; 3 cc. of above 
mixture with one-fourth grain of areco¬ 
line hydrobromide; first day negative; 
second day, 2 hookworms; third and 
fourth days negative; post-mortem, on 
fourth day, 25 hookworms, 1 whipworm, 
6 tapeworms. Combination 7 per cent 
effective against hookworms and en¬ 
tirely ineffective against whipworms 
and tapeworms. 
Dog No. 601; 13 kg.; 3.9 cc. of above 
mixture with one-half grain arecoline 
hydrobromide; first day, 1 hookworm; 
second, third, and fourth days negative; 
post-mortem, on fourth day, 19 whip¬ 
worms. Combination 100 per cent ef¬ 
fective against hookworms, entirely 
ineffective against whipworms. 
Dog No. 602; 10 kg.; 3 cc. of above 
mixture with one-fourth grain of areco¬ 
line hydrobromide; first day, 1 hook¬ 
worm; second, third, and fourth days 
negative; post-mortem, on fourth day, 
18 whipworms. Combination 100 per 
cent effective against hookworms, en¬ 
tirely ineffective against whipworms. 
Dog No. 603; 7 kg.; 2.1 cc. of above 
mixture with one-fourth grain of areco¬ 
line hydro bromide; first day, 6 hook¬ 
worms; second day, 1 whipworm; third 
and fourth days negative; post-mortem,, 
on fourth day, 1 whipworm. Combi¬ 
nation 100 per cent effective against 
hookworms and 50 per cent effective 
against whipworms. 
Dog No. 604; 9 kg.; 2,7 cc. of above 
mixture with one-fourth grain of are¬ 
coline hydrobromide; no worms passed 
in 4 days; post-mortem on fourth day, 
negative. No conclusions. 
Dog No. 605; 5 kg.; 1.5 cc. of above 
mixture with one-fourth grain of areco¬ 
line hydrobromide; first day, 1 ascarid, 
5 hookworms; second, third, and fourth 
days negative; post-mortem, on fourth 
day, 1 hookworm, 1 whipworm, 64 tape¬ 
worms (Dipylidium sp.), Combina¬ 
tion 100 per cent effective against asca¬ 
rids, 83 per cent effective against hook¬ 
worms, entirely ineffective against 
whipworms aud tapeworms. 
