An appeal to the public on the right of using oil-cement or composition for stucco, &c : containing provisos in letters patent granted for inventions, and the provisos in the act of Parliament for extending the term of the patent granted to John Liardet : with specifications to patents granted before that of Liardet for oily composition or cement, and those of Liardet, several extracts from various authors, some of which were produced in court at a late trial, also the evidence given of the public use of oil composition in different parts of the kingdom before the date of Liardet's patent : to which are added remarks, &c. on Liardet's patent and specifications, &c.