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SOURCE OF HARMATTAN, SAMIEL, SIROCCO, &c. &c.
The whole accounted for on MECHANICAL PRINCIPLES, whereby PHYSICAL
ASTRONOMY is so simplified as to be brought within the comprehension of
By L. COHEN.
PUBLISHED BY J. LETTS, JUN, 32, CORNHILL; AND SOLD BY ALL
\HE rcader of this Treatise is requested to bear in mind, that
the matter it contains is not delivered as axioms, whatever the language may seem to convey, it being laid before the public for their approbation, should its contents deserve notice.
Only • The Laws which govern the Winds without the Tropics," are insisted on, being the result of several years observations, therefore are not liable to be controverted. And this being a link of the chain of the System herein described, it is presumed that more credit will be attached to it on that account.
The Author feels the necessity of asking that indulgence for the want of method, and some of his ideas which may appear to be fanciful, require ; and he has some confidence, that so much will be granted to him, as he does not presume to literary fame, eloquence of language, nor to astronomical or mathematical learning. Truth being his chief aim, all he can trust to, is, the casy combinations of the causes, and the consequences resulting therefrom, as he has pointed them out; whereby the knowledge of Physical Astronomy inay be so simplified as to be brought within the compass of the most moderate capacities; and if his meaning be understood, so that any part of his ideas are approved, he will feel himself highly gratified by the consideration of having been useful to society.
It must be acknowledged, not to be a light matter for any one to be able to lead the generality of the world from opinions which they have entertained from their youth, particularly in Astronomy, which apparently is so firmly rooted as to be supposed by them to be immoveable. In consequence of which, the Author would not have presumed to this task, but "suspecting natural philosophy to be a much easier thing than mathematicians have generally niade of it; ard such as a plain man, who only