34 
No. I.— OUSE AND FOSS. 
Drainage. — The Swale and Ure unite together at My ton, and wind 
towards the south-east, the united streams taking the name of Ouse. At 
Newton the river receives a considerable stream from the north-east, the 
northern branch of which rises near Easkelf and Easingwold, and the 
southern in the forest of Galtres. The Foss takes its rise in the un- 
dulated distript about Gilling and Coxwold, and flows towards the south- 
west past Stillington and Strensall, joining the Ouse at York. 
Surface. — Though considerably undulated at its north-eastern corner, 
none of this district rises above the lower zone. 
Structure. — The greater part of the surface of this district consists of 
the new red sandstone strata of the central vale. On the east, these are 
margined by a broad band of lias which contains the town of Easingwold. 
At present it will not be needful to describe the drainage districts which 
make up the east and west ridings, but they may be easily traced upon a 
good map of the county. A few words in conclusion, respecting the 
position in which we stand and the path for future exertion, may be not 
unnecessary. So far as we are enabled to judge from theoretical con- 
siderations, the species of Exogens, Endogens, and even of Acrogens, 
which the county, viewed as a whole, produces, have been ascertained and 
determined with a tolerably close approximation to completeness : although 
no doubt a few others, which have not yet been detected within our limits, 
will be discovered by future research. But we can only form a general, 
and in consequence, necessarily a vague idea of the proportions in which 
they unite together to form the general body of the vegetation, and the 
manner in which is distributed over the surface. Leaving the Thallogens 
out of consideration, the determination of the Flora of Yorkshire is, to all 
intents and purposes, accomplished; but the general outline only is traced 
of the Gybele of the county. The kaleidoscope is formed and the objects 
supplied; but the mirrors require nicer adjustment before we can obtain 
symmetrically combined and accurate reflections. The most useful 
