EECEEATIVE SCIENCE. 



337 



As the collodion process is the basis of the 

 other, it is necessary to learn it first. The 

 following will be required :— 



A small room, the door of which fits tole- 

 rably tight, having a small window, if pos- 

 sible, looking north ; a light deal frame (say 

 one inch in thickness) should be made to fit 

 the window, and yellow paper stretched over 

 it, and pasted to the edge on each side, so 

 that when dry there will be two sheets of 

 paper tight on the frame, and a space of an 

 inch between them. Three or four buttons 

 will fix this firmly to the window, and it can 

 at any time be removed in half a minute. 

 No light must be admitted to the room except 

 through this yellow screen. Any apertures, 

 such as the key -hole of the door, admitting 

 white light, must be carefully covered. Under 

 the window there must be a sink lined with 

 lead, a pipe to carry off the water, and a 

 water-tap above, a shelf or two on each side 

 of the window, and a bench or table in the 

 room. In case a water-pipe cannot be con- 

 veniently brought into the room, a large jar 

 of water, covered with a lid and a small jug 

 to lade it out with, wUl answer every pur- 

 pose. In the arrangement of the operating- 

 room, any modification maybe made according 

 to circumstances, the writer only gives his 

 opinion as to what he considers most simple 

 and convenient. 



The most useful camera for home-work is 

 one taking pictures 11x9 inches of the ordi- 

 nary double-body form. When closed, to be 14 

 inches, and, when fully extended, to be about 

 26 inches in length, the frame to have 

 adapting panels for the smaller sizes of plates, 

 9 X 7, 7 X 51 5 X 4, etc. One of Eosse's 

 smallest orthographic lenses will answer 

 almost every purpose that can be required, 

 even taking good portraits, and will also be 

 the lens most useful for the collodio-albumen 

 process, hereafter to be described. A strong 

 stand for the camera will also be wanted. 

 There is a very good Prench-made stand, 

 with arrangements for elevation, depression. 



and lateral movement, which is exceedingly 

 well made, and very reasonable in price.* 



For those who do not wish to copy an 

 object larger than about one-third the natural 

 size, and who also wish to practise landscape 



Kinnear's Camera open. 



photography, it would save expense to pro- 

 cure at once a portable camera instead of the 

 one recommended, which will answer both 

 purposes, either on Captain Fowkes's, or Mr. 

 Kinnear's plan. Eacli of these has its ad- 



Kinnear's Camera closed. 



vantages, but the latter is the lightest and 

 least complicated. Captain Fowkes's camera 

 is to be procured from Ottiwell and Co., 



* The stand mentioned, and porcelain developing 

 Clip, may be procured at Mr. Pyne's, Piccadilly, Man- 

 chester. 



