CiRC No. T29. 



BOOKS AND MAPS.— The districl for iiivestigalion is included in Sheet 

 70 (93 S.W.) one-inch Ordnance Map (also published geologicallj' coloured), and 

 almost entirely falls within the limits of Sheet 189 N.E. of the six-inch map. 

 Reference may be made to Davis and Lees' West Yorkshire (1878), pp. 316-317, 

 also to Y.N.U. Circular, July 2nd, 1880. 



PERMISSION to visit their properties has Ijeen kindly granted liy Capt. 

 J. R. Lane-Fo\ and Mr. T. B. Matthe\\s. 



THE DISTRICT for investigation includes both sides of the Wharfe from 

 Flint Mill down to White Crag and the Railway Bridge, also the woods on the 

 Bramham Estate. The ground to be traversed is remarkably rich botanically. 

 The sub-soil throughout is Magnesian Limestone, which, on the south bank of the 

 river forms in places precipitous crags inaccessible except by boat. An opportunity 

 will be given of exploring these crags from the river. 



ROUTES.— Thorp Arch is the station for Boston Spa. 



I. — Members arriving at 'I'horp Arch by the 11-4 and 1 1-7 trains, will at once 

 proceed to Thorp Arch Bridge and enter the Park by the lower gate (near the 

 Bobbin Mill). After exploring the rough ground about the site of the Old Castle 

 the route will lie along the river bank through the Hall Wood to Flint Mill and 

 Horn Bank. Those members who wish to return by the right bank can cross from 

 Flint Mill by ferry boat. This party will be led by Messrs. John Jackson and F. 

 Arnold Lees. 



Mr. Matthews kindly offers the use of his boat to enable memlDers to explore 

 the precipitous crags on the south bank of the river. 



2. — Conchologists will in the afternoon visit the White Crag (for Cyclostoma) 

 and the Wood behind the Church (for Acme), under the guidance of Mr. John 

 Emmet, F.L.S. 



GEOLOGY. - 



Rev. W. Lower Carter, M. A., F.C.t.S., writes that the district chosen for tliis 

 excursion does not afford the geologist many opportunities. The Magnesian Lime- 

 stone is exposed in the gorge of the Wharfe and consists of the Upper Magnesian 

 Limestone, several outliers of which occur in the neighbourhood, underlaid by the 

 Middle Marls, which fringe the aforesaid outliers, and underneath comes the Lower 

 Magnesian Limestone which forms the surface stratum of most of the country round 

 Boston Spa. The Permian beds here do not present any features of special interest 

 for the geologist. 



Mr. P. F. Kendall, F.G.S., suggests that those geologists who are interested in 

 glacial geology should tramp over the country to the north of Thorp Arch to inves- , 

 tigate the long gravel ridges about and beyond Walton. These are the lateral 

 moraines of the Vale of York Glacier, and belong to the same series as the 

 Healaugh mounds, 



BOTANY. — The Botanical section will be oflicially represented by its 

 President, Mr. Albert H. Pawson, F. L. S. , and its Secretaries, Messrs. John Farrah, 

 F.L.S., and ]. T- Marshall, and the Mycological Committee by Mr. Charles 

 Crossland. 



Flowering Plants. — Mr. F. Arnold Lees, M.R.C.S., writes that vegetation 

 does not visibly advance ' by leaps and bounds ' in the latitude of York until I\Lay- 

 day has been reached ; so that be the season an 'early' or 'late' one. Phanero- 

 gamic botanists will have to be satisfied with that rainbow of Promise viewed on 

 Earth in verdurous tufts and buds burgeoning in an almost infinite variety of shape 

 alone. The Clematis vitalba of the railway bank beyond Thorp Arch station will 

 he little more than a net of grey lianes, .shedding its bark in string-like strips of 

 'bast.' The great Meadow Rue (Ty^rt/zV/;-?^/;/ majiis'), ^x\A the Aconitiim napellus 

 of the Wharfe bank in the Hall demesne, alilce with the --^c^rrt .4;^/Vrtfo of the hangers 

 on the south bank, will only be observable as virid knobs pu.shing up through the 



