A. Barrington, a. Lee and K. Pearson 
247 
response to his request a large number of these schedules were duly filled in. All 
this material he placed unreservedly at the disposal of Professor W. F. R Weldon, 
who in his turn handed it over for classification and calculation to the biometric 
workers in University College, London. This splendid material, for which we 
cannot too heartily thank Mr Collins and Professor Weldon, was supplemented by 
additional data extracted from the volumes of the Greyhound Stud-book*. Thus 
the four fundamental parental tables were drawn from Mr Collins' data ; four 
other parental tables for purposes of comparison and control were based on the 
stud-books. All the eight fundamental grandparental tables were based on 
pedigrees compiled from the stud-books, for Mr Collins' data extended to one 
generation only. Of the nine fundamental sibling tables, three for siblings from 
the same litter are based on Mr Collins' data, three for siblings from different 
litters and three for siblings of the same litter on the stud-books. The extraction 
of pedigrees from the stud-books and the classification of all the data into tables 
is the work of A. Barringtonf. In the calculation of the correlations, the whole 
of the 50 sets taken by the fourfold table method are due to A. Lee. The whole 
of the calculation of correlations by the mean square contingency method was 
undertaken by A. Lee and A. Barrington conjointly. The labour of classification 
and calculation has been the work of a good many months, and has been more 
strenuous than is, perhaps, apparent on the surface. Only the work of putting 
the numerical results into tabular form and drawing conclusions from them is 
due to the third joint author of this paper. 
(2) Nature of colour classificatiojis used. In the classification of the grey- 
hound we find in the first place the following main colours : Red (R.), Fatun (¥.), 
White (W.), Brindle (Bd.), Blue (Be.), Black (Bk.). Besides these main colours 
we have a series of doubtful intermediates such as Red or Fawn (R. or F.), 
Fawn or Red (F. or R.), and a wide range of mixtures or particoloured dogs. 
Such are Red-White and White-Red (R. W. and W. R.), mixtures of Red, Fawn 
and WhitQ, e.g. R. F., F. R., W. F., F. W., R. F. W., F. R. W., W. R. F., R. or F. W., 
W. F. or R., W. R. or F., and the mixed brindles chiefly W. Bd., or Bd. W., but also : 
F. Bd., Bd. F., R. Bd., Bd. R., R. Bd. W., Be. Bd., Be. Bd. W., W. Bd. Be. Lastly we 
have the Mixed Blues and Mixed Blacks, including the Ticked (Tk.), e.g. Bk. W., 
W. Bk., Bk. Tk., Bk. W. Tk., W. Bk. Tk., W. Tk., Be. Tk., Be. F., Be. W., W. Be. In 
all we have found nearly forty different colour classes. Some of these of course 
are very similar, others perhaps not so definite as might be desirable ; but the 
bulk of the cases fall into fairly well-defined groups, and the isolated units while 
they are recorded for future use in our fundamental tables have been embraced 
in wider groupings in the more manageable tables from which our numerical 
results are drawn. 
* At present twenty volumes have appeared. The Editor is Mr W. P. Lamonby and it is piiblislied 
at the " Field " Newspaper Office. 
t Actually she prepared 25 out of the 20 fundamental tables ; the remainiuR table was originally 
prepared liy P. E. Lutz, but it was revised and modified when the other series were extracted. 
