H. P. GRAY, N. A.--Mr. GRAY exhibits a number of his works this season. He seems to us to sacrifice every thing to color; and his color is not such as is generally seen in nature, but rather what he has seen in pictures. This we think a mistake, and one which we must be permitted to hope he will rectify. In the pictures which he formerly painted, a much closer attention to nature is observable. Mr. GRAY has all the feeling of an artist, with no ordinary talent; and we regret to find that he wanders from the direct path. We were among the first, if not the very first, to call public attention to his merits, and it is with reluctance that we perform the duty involved in these animadversions. 'Comparisons,' DOGBERRY tells us, 'are odorous;' we cannot help remarking, however, that Mr. GRAY'S old fellow-student, HUNTINGTON, is (_longa intervallo_) in the advance. We prefer, of our artist's present efforts, the picture of 'His Wife.' It has a pleasing effect, and is more finished than usual, and more natural in tone than his 'Magdalen.' J. T. HARRIS, A., has two pictures, and both portraits. No. 19 is the best. It exhibits a broad, free touch, and correct drawing, and is withal an excellent likeness. But we never look at Mr. HARRIS' works without being impressed with the idea that they are not finished. They seem to us, to borrow an artistical expression, as if they were in a capital state for 'glazing and toning up.' Otherwise, they are above the ordinary run of portraits. G. P. A. HEALY, H.--Mr. HEALY is a resident of Paris, but an American. He is a favorite at the French court, and has by this means a reputation to which his works generally do not entitle him. We are bound in justice to say of his present effort, however, that it is an exceedingly fine picture. It is boldly and masterly executed; forcibly drawn, honestly colored, and well expressed. There is too about it a freedom from all the usual tricks of the profession, such as a red chair, velvet collar, and fantastic back-ground, which we particularly recommend to the attention of young artists. THOMAS HICKS, A., has eight pictures in the collection, but none, excepting his portraits, which equal his former productions. No. 264, 'The Mother's Grave,' is an oft-repeated subject, and should not be attempted unless the artist is able to treat it with entire originality. There are good points about it, but none sufficiently attractive to warrant particular notice.