An art school, which started some years ago in Boston, in private hands, finally surrendered its casts, lithographs, and so forth, to the teachers of the Free Art School of the Lowell Institute. The female classes of this school are always crowded, and are doing a great deal of good. Artists are accustomed to say very disparaging things of the school at the Cooper Institute; but I visited it in December, 1866, and found a very great improvement within a few years. Under Dr. Rimmer, a most admirable lecturer on anatomy, there has been an infusion of new life. The drawings from casts looked better than I have ever seen them. They have a good master in color, and the drawing and engraving on wood by the pupils find a ready market. Two of them, Miss Roundtree and Miss Curtis, are said to have a high reputation. I was delighted to find a large class coloring photographs; for heretofore it has been almost impossible for women to receive decent instruction in this art. The classes are all full; and three times the number of pupils might be received, if there were more light in the large rooms. It is to be hoped Mr. Cooper may some time divide them, and put in gas. I have taken advantage of the residence in this country of a well-known member of the Royal Academy, Mrs. Elizabeth Murray, to ascertain what circumstances led to the formation of the Society of Female Artists, in London. To Mrs. Grote, the wife of the historian, and Mrs. Murray herself, this society owed its existence, somewhere in the winter of 1854 and 1855. There is no objection to it, so far as I know, except one apparent on its catalogues, the present preponderance of distinguished amateur artists on the Board of Direction. I insert here Mrs. Murray's letter in reply to my inquiries. The best artists, such as Rosa Bonheur and Mrs. Murray herself, exhibit with this society. MY DEAR MRS. DALL,--On my return to England, after an absence of many years, I found that women labored under very disheartening conditions; their professional occupations consisting chiefly of teaching, music and singing, literature and the fine arts. In the latter department, they came more under my own personal observation; and I found, that, although they were countenanced by men individually, collectively they were persecuted by men, seldom being permitted membership with any public body, or, when admitted, were not allowed the full privileges accorded to men. For instance: At the Royal Academy of London, women are not admitted at all to membership. On the walls of that exhibition may be seen the works of women, which rank among the best; but here their privilege ends. They assist in bringing their quota of the entrance fees, the main source of income of the academy, while they are debarred from all privileges and emoluments.