382 
GENETICS: R. PEARL 
TABLE I 
Showing in Summary Form the Effect of Continued Administration of Alcohol 
(Ethyl and Methyl) and Ether, by the Inhalation Method, upon the Treated 
Individuals Themselves 
CHARACTER OR QUALITY STUDIED 
TREATED 
INDIVIDUALS 
UNTREATED 
CONTROLS 
NET RESULTS 
ON ALCOHOLISTS 
1. 
Mean number per bird of consecutive days 
of treatment 
344.2 
0 
2. 
Net percentage mortality (to Feb. 1, 1916) 
exclusive of birds accidentally killed 
0 
41.0 
+ 
3. 
Mean body weight of females (in gms.) 
3266 
2953 
4. 
Mean egg production per bird, 14 months. . . . 
183.97 
180.80 
0 
5. 
General activity 
Reduced 
Normal 
6. 
Sexual activity 
Reduced 
Normal 
controls. A zero indicates that no effect of the treatment, one way or 
the other, has beeen detected. 
From these summarized data it is possible to gain a tolerably clear 
comprehension of the objective happenings in these experiments so 
far. The treated animals themselves are not conspicuously worse or 
better than their untreated control sisters or brothers except in respect 
to mortality rate. This is much lower in the treated than in the con- 
controls. 
Regarding egg production the following details may be mentioned. 
The egg production of the treated birds and the untreated controls 
was entirely normal in respect of its seasonal distribution, as well as in 
regard to its amount. 
There has been no significant difference in the egg production of the 
treated birds and their untreated control sisters, either in the total 
average number of eggs produced per bird, nor in the seasonal distri- 
bution of this production. The only conclusion which can be drawn 
from the statistically insignificant differences which appear between 
treated and control birds is that the inhalation treatment has not 
affected the egg production of the birds, either favorably or adversely. 
Results in the Fi progeny of treated individuals. — The general plan of 
the ma tings in 1915 was to breed a treated male of each of the three 
classes, ethyl, methyl, and ether with {a) untreated control females, and 
with {h) treated females of his own class (i.e., ethyl X ethyl 9 , methyl 
X methyl 9 , ether cf X ether 9 ) . In addition to these matings an 
untreated control male was mated with {a) untreated control females 
(6) ethyl females, {c) methyl females, and {d) ether females. 
All of the matings were of the type Black Hamburg cf X Barred 
