an ardent desire to pursue still farther that sublime subject, which the immortal Newton used as a Key to unlock the secrets of nature, and unfold the doctrines of Astronomy. It contains also the method of calculating Logarithmic Tables, and the shortest way of finding the Circumference of the Circle. Integral Calculus, Sine and Cosine of an Arc in terms of the Arc, Proof of Prob. VIII. Mens. of Surfaces, 139 140 143 Proof of Prob. VII. Mens. of Solids, 144 To find the Differential of the area of a curve, 145 To find the Differential of the Surface of Revolution, ib. 146 ib. 147 ib. Demonstration of Probs. XII. and XIII. Mens. of Solids, 148 Demonstration of Prob. XIV. Mens. of Solids, 149 Demonstration of Prob. V. Specific Gravities, ib. Demonstration of the Rules for finding the areas of Polygons, |