THE BOOK OF THE LANTERN. 143 



But for the amateur worker, to whom a few failures are 

 not of any great moment, gelatine plates are best adapted. 

 The silver bath, with its concomitant stained fingers and 

 spoiled linen, is, I think, best left alone, unless the ama- 

 teur adopts it as a necessary part of his photographic 

 education. 



Those amateur photographers who are used to the work- 

 ing of bromide paper, can produce lantern slides by an 

 easier method than any of those just reviewed, namely, by 

 means of the transferro-type paper which has lately been 

 introduced by the Eastman Company, and with which 

 many succeed in producing very fine lantern slides. This 

 paper is coated with identically the same emulsion as that 

 employed in the well-known bromide paper, and therefore 

 the amateur has an advantage at the outset, of working 

 with a medium to which he is accustomed ; its develop- 

 ment being the same as that of the ordinary bromide paper. 

 It consists of an insoluble sensitised emulsion which is 

 applied to paper having a soluble substratum of gelatine. 

 The tissue is exposed under a negative to gaslight for 

 the requisite time, and according to the density and 

 other peculiarities of the negative in question ; and is then 

 developed in a ferrous-oxalate solution in the ordinary 

 manner. It is then transferred to a piece of plain glass, 

 which should be free from bubbles and other blemishes, 

 while wet, being placed face down on the glass, and 

 squeezed into contact. As much moisture as possible is 

 then removed by the application of blotting paper. In 

 about half an hour it will be ready for stripping ; but may 



