252 MR. A. G. INNES OX TIDAL ACTION IN 
The source of the salt found in the Thurne River is clearly 
shown. 
Discussing Tables IV. and V., Mr. Sutton says, “The above 
results indicated the existence of salt springs in Hickling 
Broad and Horsey Mere.” Table VI. contains analyses made 
by him to locate these springs more precisely. 
He says of Table VI., “ It is clearly evident from the above 
that the salt comes from Horsey Mere. That it finds its way 
down *Motley Dike into the Sounds, where it becomes some- 
what diluted as it proceeds down Kendal Dike to the Hundred 
Stream. That at Thurne Mouth it meets the large body of 
water coming down the Bure, and so fresh is the latter, con- 
taining only 5 grains of salt per gallon, that it reduces the 
proportion of salt in the confluent waters to rather under 
14 grains per gallon. 
“ That the Horsey salt water is evidently backed up by 
the narrow outfall through Kendal Dike, and so finds its 
way through Deep Dike, Whitesley and Deep-Go Dike into 
Hickling Broad, where there are probably salt springs also, 
but containing much less salt than at Horsey. 
“ That from their nearness to the sea such large tracts of 
water as Horsey Mere and Hickling Broad would absorb 
a certain amount of salt from the atrftosphere, but that this 
circumstance would not account for the quantity found on 
analysis .... That it is beyond question that the salt in 
Hickling Broad is not due to tidal influence.” Mr. Sutton 
considers that the salt finds its way into the Broads by means 
of salt springs ; but as only two cases are recorded where the 
salinity at the bottom of the Broad is markedly higher than 
it is at the surface it would seem equally probable that it is 
due to a general percolation of salt water through the sub- 
soil, differing in extent in the various Broads, but fairly 
uniform in any one Broad. 
The amount of salt found in Hickling corresponds roughly 
to an admixture of about 2—3 per cent, of sea water. As we 
* This Dike is known also as Meadow Dike and Kendal Dike as 
Candle Dike. The Thurne River is sometimes called the Hundred 
Stream, dividing as it does the Hundreds of Flegg and Happing. 
