Select Collection of Valuable and Curious Arts, and Interesting Experiments

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Figures entire. When the work has thus re mained two, or three days, it may be rubbed with a piece of silk, which Will increase its metallic lustre. Nata — It is very essential that the varnish of the ground should ...