An introduction to this tract

Whereas there is nothing more necessary for promoting the improvement of Philosophical Matters, than the communicating to such, as apply their studies and endeavours that way, such things as are discovered or put in practise by others; it is therefore thought fit to employ the press as the most proper way to gratifie those, whose engagement in such studies, and delight in the advancement of learning and profitable discoveries doth entitle them to the knowledge of what this Kingdom, or other parts of the World, do, from time to time, afford, as well of the progress of the studies, labours, and attempts of the curious and learned in things of this kind, as of their compleat discoveries and performances: