Plain directions for obtaining photographic pictures by the Calotype and Energiatype, also upon Albumenized paper and Glass, by Collodion and Albumen, etc, etc. Including a Practical Treatise on Photography, with a supplement, containg the Heliochrome Process. Also Hints on The Daguerreotype; Being simple directions for obtaining portraits, vieuws,copies of engravings, drawings, sketches of machinery, etc., by the Dauerreotype Process; including the last improvements in fixing, colouring, and engraving the pictures; with a description of the apparatus. Part I by J. H. Croucher. Part II by Gustave Le Gray. Also Practical hints on the daguerreotype, by J. H. Croucher. --