DR. A.D. MAYO says, in the _New England Journal of Education_: "Although we have given place in our book-notice column to an appreciative mention of the volume, 'Development Lessons,' a new reading seems to call for a new commendation of this admirable guide to teachers. Mr. DeGraff needs no special 'boom' as a first-class institute man, and his extracts of lectures in Part III. sparkle with valuable suggestions. In no published work is Col. Parker really seen to such advantage as in the 'reports of conversations' with him in Part II., which can be studied with profit by every teacher. But perhaps the most complete portion of this admirable book is the 178 pages of lessons on the Senses, Size, Form, Place, Plants, and Insects, by MISS M.K. SMITH, now Teacher of Methods in the State Normal School at Peru, Neb." Handsomely Bound and Illustrated. 300 pages. Price by mail, $1.50.