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District of o to will:

BE IT REMEMBER HD, That on tho tenth day of No-
vember, in the thirty-first year of the Independence
of o: State of America, A. D. 1806, Mathew

[L. S.] CAREł, of the said district, hath leposited in this office; the title of a Rook, the right yhereof he claims as Proprietor, in the words followin', to wit: * Ferguson's ...I. Select Subjects, in Mechanics, Hydrosta“, tics, Hydraulics; Pneumatics,'Optics, Geography, Astronomy, “Wond Dialling. A New Edition, corrected and onlarged. With **Notes and an Asspendix, adapted to the present state of rts and Sciences by David Brewster, A.M. in two volum “ with a volume of Plates. so American Elition, carefu “revised and corrected by o Patterson, P. pfessor of M

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“ thematics, and Ted her of Natioal Philosophy in the Univero sity of Pennsylvan,

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* D. CALDWELL, o
Clerk of the District of Pennsylvania:

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LECTURE I.

Of matter and its properties—Pyrometer—Mag-
netism—Electricity - - 4.

I.ECTURE II,

Of hydrostatics, and hydraulic machines—Hydro-
static paradox—Hydrostatic bellows—Velocity
of fluids—Syphon—Tantalus's cup—Fountain
at command-Intermitting springs—Common

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The wrfings of Miologuson have been - long and justly distinguishes for their perspi. ciftly and plainness. It, seems to have been the chief object of his labours to givea fami. lior view of the various branches of physical science, and to render them accessible to those who are not accustomed to mathèmatical investigation; and the favourable reception which his works haye every where expod, are’ sisfactory proofs that, he did not labour in

vain. “. . . *} * - ^*. -The treasures of science had been long concealed in the recesses of algebraical formulf, and geometrical discussion; and men of ordi’ may capacity-were *tored from pursuing them by the repulsive fooh in which they were displayed. There were some works, indeed, which, from the absence of mathematical reasoning, may be regarded as exceptions to this

B . .

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Accommodating the

general observation; but most of them wanted that perspicuity of style, that method of viewing a difficult subject in different aspects, and that happy manner of illustrating the most abstruse facts in mechanical philosophy by new and ingéolous exposments, whoh the *:

I’.

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Ferguso lerefore."may, in some degree he regarded $ the jo. riter on hatural philosophy o to his labours we must “attribute thgt general diffusion, of scientific knowledge #mong the practical Amechanics of

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banishedghose antiquated prejudfles and erry

neous maxiff of conjouction ths; perpetually mislead thofinlettered'artist. - **

X. But it is hot o the praise of a popfl.

lar writer to Mr. Ferguson is engled. Wole he is o the oscoveries of others, o o the capgoires of his readers, we are frequently introdtsoed to invo. #. and impoements of his own. Many of

ese are well-know so the publigand while sóme of them have b is of gr %rvice to...? perimental poosop , they all evince an of common share" of mechanical genius. To a still higher commendation, however, our au. thor may justly lay claim. It has long been

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