356 REPORT—1896. 
differences observed being too unimportant to necessitate a special classi- 
fication for silk. 
The Chinese natural dyestuff Lo-kav fixed on silk with alum mordant 
is much faster than the same colour fixed on cottonfrom a soap bath, It 
was not found possible to apply it satisfactorily to wool. 
Vat Indigo Blue is apparently less fast on silk than on wool, and on 
this fibre some of the Alizarin Blues, and notably the Brilliant ‘Alizarin 
Blues, are much faster than Indigo Blue. As on wool, so on silk, Prussian 
Blue is faster to light than all other blues. ‘ 
Stonesfield Slate—Third and Final Report of the Committee, consist- 
ing of Mr. H. B. Woopwarp (Chairman), Mr. EK. A. WaLForp 
(Secretary), the late Prof. A. H. GREEN, Dr. H. Woopwarp, and Mr. 
J. WINDOES, appointed to open further sections in the neighbourhood 
yo Stonesfield 4 in order to show the relationship of the Stonesfield slate 
to the underlying and overlying strata. (Drawn wp by Mr. EDwIn 
A. Watronrp, Secretary.) 
Tue succession from the Great Oolite through the Stonesfield Slate into the 
Inferior Oolite as shown in the sections made by your Committee may be 
thus summarised :— 
Ft. in. 
Surface soil, Limestone fragments with Corals,&c. 0 9 
Great Oolite | Limestone and Marls with Ostrea (Oyster ae 17 3 
Slate beds (Stonesfield Slate) . 5 3 
| Fawn-coloured Limestone with lignite of car- 
Fullonian bonaceous markings (Chipping Norton 
Limestones) about : 18 0 
Sandy Limestones with some Marl. beds ; ; lower 
Inferior Oolite limestone with vertical plant-markings 
Series (Lower Estuarine series) . : 
Clypeus-grit zone of Ammonites Parkinsoni . 13 0 
(About 12 feet of Inferior Oolite strata can be made out below.) 
The faulted state of the bank prevents exact measurement of the 
series now assumed to be Fullonian. These beds had _ previously been 
classed with the Inferior Oolite. Notwithstanding the great care taken 
in making a practically vertical section, a series of Great Oolite beds was 
found at a much lower level than the Slate. The error was indicated in 
the Second Report, and the greater part of beds Nos. 18 to 26 have to be 
excised from the list. 
The additions to our knowledge consist mainly in the discovery of the 
strata with vertical plant-markings (evidently the equivalent of the 
Lower Estuarine Series of the Northamptonshire Inferior Oolite), and in 
the particulars given of the thickness of the higher beds of the Inferior 
Oolite and the Fullonian strata. Fawler, two miles distant, has been 
supposed to mark the virtual disappearance of the Inferior Oolite. Sir 
Joseph Prestwich, however, had grouped with the Inferior Oolite certain 
beds (14 feet 6 inches thick) which had been proved in the boring at 
Wytham, near Oxford ;' and Mr. H. B. Woodward has classed with 
the Inferior Oolite Series 30 feet of strata proved in a boring at Witney.” 
These correlations were inferential, but the facts now brought forward 
give them support. 
1 Geo. Mag. 1876, p. 238. 
2 Jurassie Rocks of Britain, vol. v. 1895, p. 42. 
