Manual of Useful Knowledge: Being a Collection of Valuable Miscellaneous Receipts and Philosophical Experiments, Selected From Various Authors. E-book. Formato PDF William Pybus   -  Forgotten Books, 2017  - 

The Experiments introduced into the latter part of the work are intended principally as subjects of national and innocent entertainment for young per sons; though they are not unworthy of the notice of others also, who may wish to see exemplified the principles of»natural philosophy.