The art of Photography is one of the most pleasing and curious results of chemical philosophy, and certainly not one of the least useful. Those who have beheld on the field of a camera obscura the minutely perfect reflection of a landscape, with its rivulet, its well-clad trees, and its animated groups, must have regretted that it was but a shadow doomed to exist only for a moment, while the light shone or the instrument remained stationary. Photography, however, enables us to render permanent the objects thus reflected. To accomplish this, no tedious or troublesome process is necessary;...