394 Referate. 
It should be pointed out that there is some possibilitiy of confusion 
in the nomenclature of “grey” eyes. Eyes popularly known as grey may 
either belong to the simplex type, or they may be duplex eyes of. the 
ringed type which contain very little pigment. Though differing but little 
in appearance their behavion in Kern, may be very distinct. For while 
the former crossed with simplex eyes never give eyes with any brown pig- 
ment, the latter may give eyes of the fully coloured brown type. Hurst 
considers that the two forms of “grey” can be distinguished by careful 
examination. The Davenports restrict the term grey to eyes which have 
a little brown pigment, i. e. to the low grade duplex eyes of Hurst. In 
this way the Davenports’ use of the term ‘blue’ is wider and contains the 
simplex greys as well as the really blue eyes of Hurst. 
Though so much remains to be done in working out the inheritance 
of the various types of eye colour it is evident that the start made by the 
present papers is of the greatest importance to the anthropologist. For 
the classificatory systems of eye colour at present in vogue will have to 
undergo considerable revision if they are to be of scientific value. 
R. C. Punnett 
Hurst, C. C. Mendels Law of Heredity and its Application to Man. 
Trans. Leicester. Lit. and Phil. Soc., 12 1908. 
In this paper, the abstract of a lecture read to the Leicester Literary 
and Philosophical Society Hurst alludes to previous results with regard to 
the heredity of eye colour and disease in man, and adds some unpublished 
observations on the inheritance of hair colour and of the musical sense. 
These observations were made on the population of Burbage where the 
author gathered his material for the study of eye colour. 
General pedigrees are given to shew that the hair known as “fiery 
red” behaves as a recessive to brown. In some cases however the domi- 
nance of brown over red is not complete. 
Certain pedigrees are also given which point to the musical temperament 
behaving as a simple recessive to the non-musical. In one pedigree of 
38 individuals the seven families concerned all had musical parents and 
were all without exception musical. In another pedigree containing both 
musical and non-musical individuals the distribution of the two types is 
in full accordance with the view that the musical sense is recessive. It 
will be of great interest to see how far future observation will bear out 
Hurst’s view of this case, the first attempt to mvestigate a temperamental 
quality in man on Mendelian lines. RC) Pinnett 
Pearson, K. A first Study of the Statistics of Pulmonary Tuberculosis. 
Eugenic Laboratory Memoirs. London 1907. 
Die Arbeit beginnt mit einer guten Charakteristik der bis jetzt auf dem 
Gebiet der Vererbung begangenen Fehler, welche zu einer großen Verschwendung 
von Arbeit führten. Pearson selbst hat die sorgfältigen Anamnesen einer 
englischen Lungenheilanstalt dazu benutzt, um die Korrelation der Phthisiker 
mit ihren Eltern und Geschwistern zu berechnen, d. h. also den Grad der 
Ähnlichkeit in bezug auf die Anlage zur Tuberkulose. Pearson fand dabei, 
daß die Korrelationskoeffizienten der Tuberkulose den auch sonst für Ver- 
erbung gefundenen gleichen und gelangt zu dem Schluß, daß die Tuber- 
kulose mit derselben Intensität vererbt wird wie irgend ein normales erbliches 
Merkmal. Der Fehler dieser Schlußfolgerung beruht darauf, daß auch die 
