638 Meteorological Obfervations. 
(c) 
Obferuations: on the Temperature of the Sea at 
Liverpool, by the late MatTHew Dosson, M. “i 
Communicated by Dr. Percivat. 
The ingenious Count Marfigli in his 
philofophical Effay towards a hiftory of the 
fea, from which the Royal Academy of Sciences 
at Paris have made a number of extra@s, ob- 
ferved, that the heat of the fea at’ different 
depths, provided the depths be very confider- 
able, is nearly equable; that the degree of heat 
is about temperate, or fifty-one degrees of 
Fahrenheit’s Thermometer; and that the varia- 
tions which \%ré difcovered towards the furface, 
are either the effects of climate, or arife from 
the particular circumftances of expofure on or 
ferent coafts. 
It may be of ufe therefore to afcertain the 
different temperatures of the fea at different 
feafons, and on different fhores; that phyficians 
may with certainty direct their patients to fuch 
places; and at fuch feafons as are beft adapted 
to their refpective conftitutions and complaints. 
The variations in the temperature of the fea 
at Liverpool, are confiderably greater than on 
any other coaft, and arife from very obvious 
caufes. The fea, before it enters the river 
Merfey, is diffufed over a wide extent of flats 
and fand-banks, which are in many parts left 
dry, during certain times. of the tide. The 
heat 
