272 REPORTS ON THE STATE OF SCIENCE, ETC. 
escarpment near Nutfield, Surrey. Here and eastwards at Tilburstow 
Hill, Godstone, a number of outliers occur south of the main scarp. The 
beds in several cases are highly inclined and much disturbed, and at first 
sight a strong suggestion is conveyed of a major fault parallel to, but to the 
south of, the main escarpment. Such a fault would lie in a known zone 
of tectonic instability, and would form an important element in Wealden 
structure. An alternative hypothesis attributed the outlying disturbed 
masses to large scale slip-faulting of the type seen on many British sea- 
coasts, as well as along the banks of the Panama Canal. A large number 
of borings were made under the supervision of Mr. F. Gosling, B.Sc., 
F.G.S., and the evidence from these has been brought together in maps 
and sections, which it is hoped will shortly be published. ‘The evidence 
so far obtained is definitely opposed to the hypothesis of regional faulting, 
but enables the detailed reconstruction of a structural arrangement con- 
sistent with bodily slipping of portions of the former scarp-face. An 
important contributory factor in the process here, and probably elsewhere, is 
the flattening, or reversal of the general northerly dip, in the vicinity of 
the present escarpment. 
SEX PHYSIOLOGY. 
Final Report of Committee on the Influence of the Sex Physiology of the 
Parents on the Sex-ratio of the Offspring (Prof. J. H. Orton, Chazr- 
man; Mrs. RutH C. Bisse, Secretary; Prof. A. M. Carr- 
SAUNDERS, Miss E. C. HERDMAN). 
Tue EFFECT OF ALTERED SEX PHYSIOLOGY OF THE PARENT ON THE SEX 
RATIO OF THE OFFSPRING IN GUINEA-PIGS. 
SOME years ago a series of experiments was carried out and yielded 
extremely interesting results. Some male guinea-pigs each had one testis 
removed when only a few weeks old. When they became adult they were 
used for breeding, and gave offspring in the proportion of 299:16¢. As 
there were more than 300 young, it seemed fairly certain that the proportions 
were not due to chance. 
An attempt has been made during the past three years to repeat these 
experiments on a small scale, but the animals have bred so slowly that the 
number of offspring is still too small to give a conclusive result. As they 
are breeding so slowly it has been decided not to continue the experiments 
during the coming year, but to wait until the animals can be kept under 
more normal conditions. It is not proposed, therefore, to ask for any 
further grant at the present time. 
A grant of £5 was received last year and was used for the maintenance 
of the stock. 
Mrs. Bisbee wishes to express her gratitude to the Committee for the 
financial help which she has received, and to assure them that the work 
will be continued as soon as possible. 
