AND LOCAL SCIENTIFIC INVESTIGATION. 
43 
The Committee recommends that the pre-historic remains of the 
British Isles he tabulated under the following groups:—(1) caves 
and caverns; (2) camps and earthworks; (3) lake-dwellings and 
crannoges ; (4) menhirs and dolmens ; and (5) barrows, tumuli, and 
other burial places. Their position should be laid down on the one- 
inch Ordnance Survey maps, and distinctive signs should be used, 
for which see * Rep. Brit. Assoc.’ for 1888, p. 289. The position 
may be denoted thus:—Aubury Camp, near Bedbourn : 46-|A; 
this indicating that the camp is 9*6 inches from the top and 3*4 
inches from the left-hand margin of sheet 46 (old survey), or, on 
the actual ground, about 9£ miles from the north and 3£ from the 
west margin of the area represented in the map. (If the maps of 
the new survey are used, the letters H. S. should precede the 
number of the sheet.) 
IY. Investigations conducted by other Societies or by Individual 
Observers. 
Information with reference to the following subjects is collected 
by the Societies or observers whose names are given, and further 
particulars as to the method of observation, etc., will be furnished 
by them on application. These subjects are all very suitable for 
investigation by Provincial Scientific Societies. 
Observers are recommended, as in the case of subjects investi¬ 
gated by the British Association, to communicate the information 
they obtain to their own local Society as well as to the Societies 
or individuals here named. 
1. Rainfall. 
Investigation conducted by Mr. G. J. Symons, F.E.S., 62, 
Camden Square, London, H.W. 
The systematic investigation of the rainfall of the British Isles 
was commenced by Mr. Symons in the year 1860, and his first 
report on the rainfall, which was for the years 1860 and 1861, was 
communicated to the British Association at Cambridge in 1862, a 
Committee with a grant being subsequently appointed. From 
1877 Mr. Symons has undertaken the collection, compilation, and 
annual publication in his ‘ British Rainfall,’ of statistics of the 
rainfall of the British Isles at his own expense assisted by contri¬ 
butions from observers and others. His staff of observers now 
numbers nearly 3000. 
Mr. Symons will supply, gratis, Instructions to Rainfall Ob¬ 
servers, and forms on which to enter the records to be sent to him. 
The observations are in all cases to be made daily at 9 a.m., and 
to be entered to the previous day. 
2. Phenological Phenomena. 
Investigation conducted under the auspices of the Royal Meteor¬ 
ological Society, 30, Great George Street, London, S.W. 
A Committee of the British Association was appointed at York 
in 1844 for the purpose of reporting on the registration of periodical 
phenomena of animals and vegetables, and in the following year 
