Exhibits from Rothamsted ; Cirencester ; and Cambridge . 203 
Royal Agricultural College, Cirencester. — The College 
exhibited diagrams illustrating the chemical composition of 
foods, and the results of twenty years’ continuous manurial 
experiments on grass land. The Natural History Department 
sent a number of the commoner fossils from the Jurassic 
formation on which the College is situated* a case showing 
the formation of soil from the oolite ; exhibits illustrating 
the life-histories of various insect pests, including the click 
beetle (with its larva, the wireworm), the frit fly, &c. ; certain 
fruits showing the modes of dispersal of seeds ; two cases 
illustrating the Natural Orders of the Insecta ; and two 
frames showing diseases which attack the leaves of trees. The 
Veterinary Department of the College sent anatomical and 
pathological specimens ; examples of drugs and plants used 
in medicine and to illustrate lectures on Materia Medica ; 
specimen horse shoes made at the College to illustrate the 
principles of shoeing ; and cultures of pathogenic organisms 
used in connection with bacteriological study and research. 
The Professor of Agriculture again sent the College collection 
of wools from different breeds of sheep, showing the varied 
length of staple and the fineness or otherwise of the fibre. 
He also exhibited samples of turf from Devonshire, grown 
on a clay subsoil, and illustrating the marked effect of the 
application of basic slag, as compared with turf from the same 
field where no slag had been applied. 
Cambridge University Agricultural Department. — The ex- 
hibits were chiefly designed to explain and illustrate the 
Department’s work in plant breeding. The interest of the 
collection was increased by photographs of sheep on which 
experiments have been made, and by a number of animal 
exhibits kindly lent by Mr. W. Bateson, F.R.S., and Mr R. C. 
Punnett, M.A., of Cambridge. The object of the latter group 
of specimens was to show that the same principles hold good 
in the breeding both of plants and animals . 1 The plants and 
animals represented were wheat, barley, sweet peas, sheep, 
rats, and fowls. 
The first group of exhibits illustrated the effects of crossing 
two breeds differing in a single character. In crosses between 
wheats which differed only in being bearded or beardless, or 
in having a rough or smooth chaff, it was shown that the 
beardless condition and the hairiness of the chaff appear in 
their full intensity in the cross-breds. In the generation raised 
from these cross-bred plants, three of the beardless and the 
rough chaff are found, on the average, to each bearded or 
smooth-chaffed individual. 
1 See also the article at page 46 of this 'Volume on “The Application of 
Mendel’s Laws of Inheritance to Breeding Problems,” by R. H. Biifen, M.A. 
