carbon, a photograph of that beautifully painted picture entitled "A Fairy Raid," which was exhibited last year in the rooms of the Royal Academy by Sir Noel Paton. As in the former case, Mr. Annan copied the painting, Sir Noel worked on a print in monochrome, which was again photographed by Mr. Annan, and the negative passed to Mr. J. W. Swan to be printed in carbon. I understand that Poynter's celebrated picture of "Israel in Egypt" is about to be published, in a similar manner, by the Autotype Company. It is therefore quite evident that photography is becoming, in reality, more and more "a foe to graphic art," and eclipsing the lights and deepening the shadows of the _unluxy_ engraver. Mr. McLachlan has again spoken without giving any very materially new facts, or throwing much more light on his mysterious mode of working. The great point is, to throw light on the concentrated solution of nitrate of silver; and until that has been done it will be impossible for any one to say from experience and practice that there is nothing in the principle. Mr. McLachlan attributes a chemical property to the action of light on the bath that has never been thought of before, and he seems to believe it so sincerely himself, and expresses his convictions so earnestly, that I think photographers are somewhat bound to wait patiently till time and light will enable them to comply with all the conditions he lays down, and make a series of careful experiments, before they can say whether they are under obligations to him or not. At any rate, natural justice suggests that they should not render a foregone verdict. _May 17th, 1868._ * * * * * The Exhibition of National Portraits--The Tintype of America--The Spirit of Photography in Canada--The "Wise Week," and the Total Eclipse of the Sun.