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All art is founded in science, and the science is of little Talue which does not serve as a foundation to some beneficial art. On the most sublime of all sciences, theology and ethics, is built the mo3t important of all arts, the art of living. The abstract mathematical sciences serve as a ground-work to the arts of the land-measurer and the accountant; and in conjunction with natural philosophy, including geography and astronomy, to those of the architect, the navigator, the dialist, and many others. Of what consequence anatomy is to surgery, and that part of physiology which touches the laws of gravitation and of motion, is to the artificer, is a matter too obvious to need illustration. The general remark might, if necessary, be exemplified throughout the whole circle of arts, both useful and elegant. Valuable knowledge therefore always lead to some practical skill, and is perfected in it. On the other hand, the practical skill loses much of its beauty and extensive utility, which does not originate in knowledge. There is by consequence a natural relation between the sci


ences and the arts, like that which subsists between the parent and the offspring.

I Acknowledge indeed that these are sometimes unnaturally separated; and that, by the mere influence of example on the one hand, and imitation on the other, some progress may be made in an art, without the knowledge of the principles from which it sprang. By the help of a few rules, which men are taught to use mechanically, a good practical arithmetician may be formed, who neither knows the reasons on which the rules he works by were first established, nor ever thinks it of any moment to enquire into them. In like manner, do we not frequently meet with expert artisans, who are ignorant of the six mechanical powers, which, though in the exercise of their profession they daily employ, they do not understand the principles whereby, in any instance, the result of their application is ascertained? The propagation of the arts may therefore be compared more justly to that variety which takes place in the vegetable kingdom, than to the uniformity which obtains universally in the animal world ; for, as to the anomalous race of zoophytes, I do not comprehend them in the number. It is not always necessary that the plant spring from the seed, a slip from another plant will often answer the purpose. There is, however, a very considerable differ

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