fixing the designs. This paper was not, however, sufficiently sen- 

 sitive to be used in the camera-obscura ; but Mr. Talbot continuing 

 his experiments, found means to increase the sensibility of his 

 paper, and in 1841 patented the process, to which he has given the 

 name of CALOTYPE, but which has recently (in accordance with 

 the fashionable photographic nomenclature) been termed the 

 TALBOTYPE. Many distinguished scientific men have lately 

 devoted their attention to this subject ; and various processes on 

 paper have been from time to time announced by Sir John Her- 

 schel, Mr. Robert Hunt, and others, under the names of AMPHI- 

 TYPE, ANTHOTYPE, CHROMOTYPE, CHRYSOTYPE, CYANOTYPE, 

 ENERGIATYPE, etc., etc. The first edition of this little work 

 referred to the Calotype and Energiatype only; but we shall 

 endeavour to render our present Manual more complete by such 

 notices of the various processes just enumerated, as their particular 

 merits may seem to require. The Daguerreotype, from its pecu- 

 liarity and importance, demands a separate consideration, and is 

 made the subject of a distinct number of the present series.* 

 Avoiding, as far as possible, all scientific technicalities, we shall 

 endeavour to give such concise and plain directions as will enable 

 the amateur to obtain the most successful results. Those who may 

 desire to learn something of the philosophical principles involved 

 in the experiments brought under their notice in the subsequent 

 pages, will do well to consult Mr. Robert Hunt's valuable Work, 

 entitled, "Researches on Light," published in the course of the 

 last year. 



Befoie entering on the various processes we are about to des- 

 cribe, we shall briefly notice the apparatus which the amateur will 

 require, in performing this class of photographic operations. Where 

 camera pictures are not desired, it will be simple and inexpensive. 



Some camel's-hair brushes, a quire or two of good writing paper, 

 and a few sheets of blotting paper are indispensable. The brushes 

 should be large, the hair collected together in one pencil, and must 

 be, by no means, bound in tin. A separate brush is required for 

 each solution, which should be carefully washed after using. 

 The paper should be carefully selected : to a want of sufficient 

 caution in this respect, must be attributed the constant failures of 

 many experimenters. Whatman's or Turner's superfine yellow or 

 blue wove, is generally recommended, but Moinier's pure white 



* Photographic Manuals, No. 2. Practical Hints on the Daguerreotype. 

 T. & R. Willats, 98, Cheapside, London. 



