This book, "A popular treatise on the warming and ventilation of buildings showing the advantages of the improved system of heated water circulation, &c. 1", by C.J. Richardson, is a replication of a book originally published before 1837. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.