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RECOMMENDATIONS 
OF 
THE COMMITTEES. 
Committee for Mathematics, &c. 
The Committee recommend that Reports should be applied 
for by the Association on the following subjects 
I. On the recent theoretical and practical history of the 
Pendulum. 
II. On the present state of the analytical theory of Hydro¬ 
statics and Hydrodynamics ; stating how far the leading pro¬ 
blems recently discussed have been solved theoretically,—on 
what suppositions,—and wdiat remains wanting to complete the 
solution. 
III. On the present state of our knowledge of Hydraulics as 
a branch of Engineering; stating whether it appears from the 
writings of Dutch, Italian, and other authors, that any general 
principles are established on this subject; what they are; and 
what are the points contested among authors. 
IV. On the present state of our knowledge of the Strength 
of Materials ; whether from the experiments of various authors 
any general principles have been obtained; what these are; how 
modified in their application to different substances ; and what 
are the differences of opinion which prevail among authors on 
this subject. 
V. On the state of our knowledge respecting the Magnetism 
of the Earth. 
The Committee recommend as a subject for examination, the 
law of the Resistance of Water to bodies in motion. 
The Committee recommend,—That a request be made to 
the Portsmouth Philosophical Association, through its deputies, 
to institute a series of hourly meteorological observations at that 
place. 
That the Secretaries of the Yorkshire Philosophical Society 
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