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and Sir Humphry Davey experimented carefully； for the purpose of endeavoring to fix the drawings thus obtained； yet the object could not be accomplished； and the whole ended in failure。〃
This； by their own showing； was the earliest attempt of the English savans。 But this much of the principle was known to the Alchemists at an early date although practically produced in another wayas the following experiment； to be found in old books； amply proves。
〃Dissolve chalk in aquafortis to the consistence of milk； and add to it a strong solution of silver； keep this liquor in a glass bottle well stopped； then cutting out from a piece of paper the letters you would have appear； paste it on the decanter； and lay it in the sun's rays in such a manner that the rays may pass through the spaces cut out of the paper and fall on the surface of the liquor the part of the glass through which the rays pass will be turned black； while that under the paper remains white； but particular care must be observed that the bottle be not moved during the operation。〃
Had not the alchemists been so intent upon the desire to discover the far famed philosopher's stone； as to make them unmindful of the accidental dawnings of more valuable discoveries； this little experiment in chemistry might have induced them to prosecute a more thorough search into the principle； and Photogenic art would not now； as it is； be a new one。
It is even asserted that the Jugglers of India were for many ages in possession of a secret by which they were enabled； in a brief space； to copy the likeness of any individual by the action of light。 This fact； if fact it be； may account for the celebrated magic mirrors said to be possessed by these jugglers； and probable cause of their power over the people。
However； as early as 1556 the fact was established that a combination of chloride and silver。 called； from its appearance； horn silver； was blackened by the sun's rays； and in the latter part of the last century Mrs。 Fulhame published an experiment by which a change of color was effected in the chloride of gold by the agency of light； and gave it as her opinion that words might be written in this way。 These incidents are considered as the first steps towards the discovery of the Photogenic art。
Mr。 Wedgwood's experiments can scarcely be said to be any improvement on them since he failed to bring them to practical usefulness； and his countrymen will have to be satisfied with awarding the honor of its complete adaptation to practical purposes； to MM。 Niepce and Daguerre of France； and to Professors Draper； and Morse of New…York。
These gentlemenMM。 Niepce and Daguerrepursued the subject simultaneously； without either； however being aware of the experiments of his colleague in science。 For several years； each pursued his researches individually until chance made them acquainted； when they entered into co…partnership； and conjointly brought the art almost to perfection。
M。 Niepce presented his first paper on the subject to the Royal Society in 1827； naming his discovery Heliography。 What led him to the study of the principles of the art I have no means； at present； of knowing； but it was probably owing to the facts recorded by the Alchemists； Mrs。 Fulhame and others； already mentioned。 But M。 Daguerre； who is a celebrated dioramic painter； being desirous of employing some of the singularly changeable salts of silver to produce a peculiar class of effects in his paintings； was led to pursue an investigation which resulted in the discovery of the Daguerreotype； or Photogenic drawing on plates of copper coated with silver。
To this gentlemanto his liberalityare we Americans indebted for the free use of his invention； and the large and increasing class of Daguerrean artists of this country should hold him in the most profound respect for it。 He was not willing that it should be confined to a few individuals who might monopolise the benefits to be derived from its practice； and shut out all chance of improvement。 Like a true； noble hearted French gentleman he desired that his invention should spread freely throughout the whole world。 With these views he opened negociations with the French government which were concluded most favorably to both the inventors； and France has the 〃glory of endowing the whole world of science and art with one of the most surprising discoveries that honor the land。〃
Notwithstanding this； it has been patented in England and the result is what might have been expected： English pictures are far below the standard of excellence of those taken by American artists。 I have seen some medium portraits； for which a guinea each had been paid； and taken too； by a celebrated artist； that our poorest Daguerreotypists would be ashamed to show to a second person； much less suffer to leave their rooms。
CALOTYPE； the name given to one of the methods of Photogenic drawing on paper； discovered； and perfected by Mr。 Fox Talbot of England； is precisely in the same predicament； not only in that country but in the United States； Mr。 Talbot being patentee in both。 He is a man of some wealth； I believe； but he demands so high a price for a single right in this country； that none can be found who have the temerity to purchase。
The execution of his pictures is also inferior to those taken by the German artists； and I would remark en passant； that the Messrs。 Mead exhibited at the last fair of the American Institute； （of 1848；） four Calotypes； which one of the firm brought from Germany last Spring； that for beauty； depth of tone and excellence of execution surpass the finest steel engraving。
When Mr。 Talbot's patent for the United States expires and our ingenious Yankee boys have the opportunity； I have not the slightest doubt of the Calotype； in their hands； entirely superceding the Daguerreotype。
Let them； therefore； study the principles of the art as laid down in this little work； experiment； practice and perfect themselves in it； and when that time does arrive be prepared to produce that degree of excellence in Calotype they have already obtained in Daguerreotype。
It is to Professor Samuel F。 B。 Morse； the distinguished inventor of the Magnetic Telegraph； of New York； that we are indebted for the application of Photography； to portrait taking。 He was in Paris； for the purpose of presenting to the scientific world his Electro…Magnetic Telegraph； at the time； （1838；） M。 Daguerre announced his splendid discovery； and its astounding results having an important bearing on the arts of design arrested his attention。 In his letter to me on the subject； the Professor gives the following interesting facts。
〃The process was a secret； and negociations were then in progress； for the disclosure of it to the public between the French government and the distinguished discoverer。 M。 Daguerre had shown his results to the king； and to a few only of the distinguished savans； and by the advice of M。 Arago； had determined to wait the action of the French Chambers； before showing them to any other persons。 I was exceedingly desirous of seeing them； but knew not how to approach M。 Daguerre who was a stranger to me。 On mentioning my desire to Robert Walsh； Esq。； our worthy