...obscura. ' His numerous experiments, however, proved unsuccessful,' and the images were ' found to be too faint to produce, in any moderate time, an effect upon the nitrate of silver.' ' In following these processes,' he adds, I have found that the images of small objects, produced by...

...means of the camera obscura," we quote faithfully a passage from the article, " have been found to be too faint to produce, in any moderate time, an effect upon the nitrate of silver." The commentator upon Wedgewood's experiments, the illustrious Sir Humphry Davy, does not contradict...

...obscura have been found too faint to PHOTOGENIC DRAWING. produce, in any moderate time, an effitot upon the nitrate of silver. To copy these images was...Davy. I have been informed by a scientific friend thiit this unfavourable result of Mr. Wedgwood's and Sir Humphry Davy's experiments, was the chief...

...producing different intensities of colour. " The images formed by means of a citmera obseitra have been found too faint to produce in any moderate time...effect upon the nitrate of silver. To copy these images wa« the first object of Mr. Wedgwood, but all his numerous experiments proved unsuccessful." These...

...copiren. The Images formed by means of a camera obscura, heifst es wörtlich darin, have been found to be too faint to produce, in any moderate time, an effect upon the nitrate of silver. Der Comuieutator von Wedgewood, der berühmte Humphry Davy, widersprach nicht der Aeufserung in Betreff...

...copiren. The images formed by means of a camera obscura, heifst es wörtlich darin, have been found to be too faint to produce, in any moderate time, an effect upon the nitrate of silver. Der Commentator von Wedgewood, der berühmte Humphry Davy, widersprach nicht der Aeufscrung m Betreff...

...means of the camera obscura," we quote faithfully a passage from the article, " have been found to be too faint to produce, in any moderate time, an effect upon the nitrate of silver." The commentator upon Wedgewood's experiments, the illustrious Davy, does not contradict the assertion...

...sur du nitrate d'argent. » ( The images formed by means of a camera obscura , hâve been found to be too faint to produce , in any moderate time , an effect upon the nitrate ofsilver. ) « Le commentateur de Wedgwood , l'illustre Humphry Davy, ne contredit pas l'assertion...

...obscura. 'His numerous experiments, 'however, proved unsuccessful,' and the images were 'found to be too faint to produce, in any 'moderate time, an effect upon the nitrate of 'silver.' 'In following these processes,' he adds, 'I have found that the images of small objects, • produced...

...obscura. ' His numerous experiments, how' ever, proved unsuccessful,' and the images were ' found to be ' too faint to produce, in any moderate time, an effect upon the ' nitrate of silver.' ' In following these processes,' he adds, ' I have found that the images of small objects, produced...