Calendar: 1863-1864 Page 149

APPLIED SCIENCES 149 Arrangements are made for complete Course of Instruc- tion in Photography glass house with commodious deve- loping rooms has been erected and in connexion with it Laboratory for the preparation of Photographic Chemicals Students will be afforded every facility for practising the Art in all its branches In addition to the regular College Course occasional Classes are formed consisting each of about six gentlemen who meet twice week Ten Lectures are given of two hours each for which the fee is 3s to be paid in the office of the College The fee for Private Instruction is 51 5s for ten Lessons or 101 10s for three Courses There will also be charge of 11 each Course for Chemicals The following is Syllabus of the Course of Lectures THEORY OP PHOTOGRAPHIC PROCESSES The Salts of Silver employed in Photography-their Nature and Properties-Illustrations of their relative Sensibility to the-direct Action of Light-Experiments showing the accele- rating Action of Organic Matters &c -Explanation of the Changes Phenomena of the Development of an Invisible Image -Illus- trations of Molecular Changes-Moser's Experiments-Reduc- tion of Oxides to the Metallic State Photographic Action of Coloured Light -Blue Red and Yellow Glasses-Flowers of Various Tints-Surface Reflection of White Light APPARATUS AND CHEMICALS The Camera -Rigid and Folding Cameras-Swinging Backs -Fowkes's Portable Camera Lenses -The Double Combination-the Single Achromatic Lens-Use of Diaphragms Collodion Its Nature and Mode of Preparation-Varieties of Pyroxyline-Glutinous and Fluid Collodion-the Iodizing Solution-Explanation of Changes which ensue on mixing The Nitrate Bath -Purification of Commercial Nitrate of Silver-Mode of Saturating with Iodide-Use of Litmus Papers for Testing