ON THE SEASONAL VARIATIONS OF TEMPERATURE. 93 
similar work. To all of these Societies, to their secretaries, and espe- 
cially to their observers, the Committee has to record deep obligations. 
The object which the Committee has in view is to investigate the 
changes in the temperature of exposed water-surfaces with the seasons, 
and the modifying influences of situation, rapidity of flow, and other con- 
ditions. The rivers in which observations have now been made differ 
widely in geographical and climatic condition, the cool, equable climate of 
Caithness and the great range of temperature experienced in Kent being 
extreme types. In addition to the observations detailed in the accom- 
panying tables, the Committee will have access to a good deal of previously 
printed but undiscussed observations, and to an immense mass of unpub- 
lished observations in the keeping of the Scottish Meteorological Society. 
It is also hoped that the observations of the Fishery Board for Scotland, 
the Tweed River Commission, the Severn Fishery Board, and other 
public bodies which have been induced by various members of this Com- 
raittee to undertake observations will become available for discussion. 
Impressed with a sense of the importance of this research to the science 
of Meteorology, and incidentally to many practical matters, the Committee 
appeals to the British Association for assistance in discussing these obser- 
vations, asking to be reappointed, with a grant of 50/., for the purpose of 
drawing up a complete report. 
Statement of Observations Collected by the Committee. 
River, &c. Observers Period of Observations 
I.—In ENGLAND. 
Luge . ’ . | Mr. A. Ward, Aymestrey . | Apl. 25, 1889-Sept. 27, 1889 
Avon (Warwick) | Mr. G. Duke, Hill Wooton — 
Severn . i . | Mr. E. Collens, Stourport . | Mar. 25, 1889-May 31, 1890 
1 Taff - 5 . | Mr. Pettigrew, Cardiff . . | Feb. 17, 1889 (in progress) 
1 Breaksea Lightship | Mr. Walters . . , | Mars, 1889 ,, . 
2Avon . C . | Mr. 8. W. Sutcliffe, Clifton — 
* English and Welsh | Messrs. Pain and Bartlett . | Feb. 6, 1889 (in progress) 
Grounds Lightship 
’Kennet . : . | Messrs. W. B. and H. G. | Dec. 9, 1888 (in progress) 
Maurice, Marlborough 
4Stour . : . | Mr. H. Dean, Canterbury . | Dec. 13,1888 ,, f 
1 Medway . é . | Sergeant-Major Bolton, New | Mar. 25, 1889 ,, 43 
: | Brompton 
Nidd . A . | Mr. G. Paul, Knaresborough . | Mar. 16, 1889 ,, as 
Dove 4 " . | Mr. H. H. Brindley, Uttoxeter | Mar. 17, 1889-Nov. 27, 1889 
Sifrent, . : . | Mr. F. E. Lott, Burton . . | Jan. 7, 1889 (in progress) 
® Nene and reservoir. | Mr. Eunson, Northampton . | Jan. 1,1889 ,, 4 
7 Witham. A . | Mr. H. Preston, Grantham . | Apl. 2, 1889 _,, - 
§Denshaw and Pie- | Mr. W. Watts, F.G.S., Old- | Jan. 1,1889 ,, 3 
thorn Reservoirs ham | 
' Under the care of the Cardiff Naturalists’ Society; Mr. R. W. Atkinson, Secretary. 
* Under the care of the Bristol Naturalists’ Society ; Mr. A. Leipner, Secretary. 
% Under the care of the Marlborough College Natural History Society. 
* Under the care of the East Kent Natural History Society ; special oversight of 
Col. W. H. Horseley, R.E. 
5 Under the care of the Burton-on-Trent Natural History Society. 
® Under the care of the Northampton Natural History Society. 
7 Under the care of the Grantham Scientific Society. 
* Under the care of the Manchester Geological Society; Mr. Mark Stirrup, F.G.S., 
Secretary. 
