TESTIMONIALE

twenty years ago We rejoice to believe that many myriads of

the young — and not of the young only — will here be introduced to discoveries and spéculations of so much interest and grandeur."

The Commonwealth (Boston), in noticing the " Handbook of Naturâl Philosophy," says : " The merit of this, as of the other volumes, is that ît breaks away from the traditional method of préparation of such works, and by original arrangement, the introduction of the latest discoveries and experiments, and the amplest illustration, gives at once the most complète and accurate data of the subject-matter treated. It is fresh and pertinent throughout, and is equaily valuable in schoot counting-house, or famiiy."

The Boston Journal of Chemistry (March, 1869,) says of the séries : " We have carefully examined thèse books, and find them to be compiled with great accuracy and care ; and the arrangement of topics and the gênerai style are admirable. The pleasing perspicuity and commendable exactness, with which the elementary principles and facts of the physical sciences are presented in thèse treatises, are in marked contrast with a number of text-books which have somehow found their way into many of our schools."

The Round Table (New York) says of the "Handbook of the Stars " : " It is a very admirable spécimen of the abilities of the authors. There is scarcely anything in it which young pupils cannot readily comprehend. The illustrations are really beautiful, and the collection of celestial maps at the end adds greatly to the value of the work. An Appendix discusses with Considérable thoroughness some of the more abstruse subjects touched upon in the body of the book. The name scarcely expresses the full scope of this manu al. It is really an elementary treatise on astronomy without mathematics, and is very good reading for any one with a taste for science but neither the time nor the inclination to go deeply into its study. It is brought down to the very latest dates, — another advantage in thèse days of stéréotype plates and non-revision. We hope that Messrs. Rolfe and Gillet will, at least once in every three or four years, go carefully over their text-books and bring them down to the time of the latest corrections and discoveries. By so doing, they will very effectuai ly keep the start of those lazy writers who, when they have finished a school-

TESTIMONIALS.

book on a progressive science, imagine it is to last without revision as long as they remain in the world to draw an income from its sales."

Sillimarfs Journal (March, 1869,) says of the " Handbook of Chcmistry " : " On the whole, the book is a valuable addition to our meagre collection of text-books on the new System, and vve commend it to the notice of teachers."

La Renaissance Louisianaise (New Orléans) says of the " Natural Philosophy " : " Cet ouvrage instructif convient à l'usage des fens du monde aussi bien qu'à celui des étudiants. C'est un manuel qui traite avec une grande clarté démonstrative sur tous les sujets élémentaires de la Physique, d'après les plus récentes découvertes

Les auteurs ont, selon nous, complètement réussi à produire un ouvrage utile au plus haut point et dont personne ne devrait se dispenser."

Mr. S. M. Capron, of the High School, Hartford, Conn., where the " Natural Philosophy " has been adopted, says : " We have examined ail the récent text-books on this subject which have appeared, and feel convinced that this is the best arranged of ail for our purpose, and most fully up to the présent state of scientific research."

Professor Edward Conant, of the Vermont State Normal School, wrîtes that his pupils have used the same book " vvith constant déliât, and, of course, with profit."

Mr. L. R. Williston, of Cambridge, Mass., writes thus : " I wiH express my good opinion of the ' Handbook of Natural Philosophy f by simply saying that I intend to use it in my school. I shall also continue to use the 1 Handbook of the Stars,' and shall use your book in Chemistry, if I use any."

Mr. W. B. Stickney, Master of the High School, Chicopee, Mass., says : " The * Handbook of the Stars ' bears the test of the schoolroom. My class is delighted with it."

TESTIMONIALS.

Professor W. S. Smyth, of Wyoming Semmary, Kingston, Pa., who has adopted the same book, says : " For logical arrangement, clearness of expression and illustration, as well as for mechanical exécution, it is unsurpassed."

Professor John B. Burwell of the Charlotte Female Institute, North Carolina, writes : " I have been using the books for the last two or three years, and consider them superior in ail respects to any others I have ever met with. I can also add the recommendation of Dr. Philips, whose réputation as a teacher is known throughout the South."

The following is from the officiai report of the regular meeting of the Chicago Board of Education, May 7, 1869 : —

"Mr. Carter moved to adopt the next recommendation of the Committee, to wit : Rolfe and Gillet's Chemistry, in place of Wells's Chemistry.

" Carried. Yeas — Messrs. Ballantyne, Bond, Bonfield, Briggs, Carter, Guilford, Holden, King, Meserve, Runyan, Shackford, Tinkham, and Walsh — 13. Nays — None."

%* This popular course of Physics has been officially adopted by the State Boaiji of Maryland and Minnesota, and is already used, in whole or in part, in the cities of Baltimore, Pittsburg, Wheeling, Richmond, Savannah, Charleston, Mobile, New Orléans, Galveston, Memphis, Nashville, Louisville, St. Louis, Chicago, Milwaukee, Racine, Bloomington, Détroit, Cincinnati, Columbus, Dayton, Cleveland, St. Joseph, Wheeling, Buffalo, Rochester, Newark, Worcester, Taunton, Lowell, Bangor, Lawrence, Haverhill, Bath, Milford, Hartford, New London, New Bedfofd, Boston, Cambridge, Dover, Concord, Nashua, Burlington, Dorchester, Manchester, Pittsfield, Chelsea, Chicopee, Northampton, San Francisco, etc., etc.