DR. A. S. PACKARD'S WORKS.— Continued. 



From Leroy R. Halsey, Superintendent of Schools, Battle Creek, 

 Mich. : — The book is an excellent one. I was pleased with the first ex- 

 amination of it, and find that it works well in the class-room. It is, for 

 our own school purposes, the best text-book on the subject with which 

 I am acquainted. 



From M. A. B. Kelly, Superintendent of Model Department, Albany 

 {N. Y.) Normal School : — Dr. Packard seems to possess a special tacr 

 for presenting scientific truths in a concise and attractive form. The 

 First Lessons, though decidedly elementary, are encouragingly pro- 

 gressive. The illustrations are ample, and include subjects for study 

 which may be secured by the student with little or no difficulty. I am 

 satisfied, from what I have noticed, that it is just what we need for 

 beginners in zoology. 



From Thomas Newlin, Superintendent of Spiceland (Pud.) Academy 

 and late Professor of Biology in Haverford College : — It contains what 

 every boy and girl should know, and what the schools are prepared to 

 teach. 



From A. L. Lane, Teacher in Coburn Classical Institute, Me. : — A 

 most admirable work. Constructed on the very logical method of pro- 

 ceeding from the simplest to the highest,— from the amoeba to man, — 

 it gives very clear and accurate descriptions of typical forms, and 

 thereby furnishes a broad foundation for subsequent study. 



GUIDE TO THE STUDY OF INSECTS. 



and a Treatise on those Injurious and Beneficial to Crops. For the 

 use of Colleges, Farm-Schools, and Agriculturists. With fifteen 

 plates and six hundred and seventy wood-cuts. 8vo. 715 pp. 



From Professor L. Agassiz:— I hold that your work ought, in con 

 nection with Harris's " Treatise on Insects Injurious to Vegetation," to 

 which it is, as it were, the key, to be introduced in all our agricultural 

 colleges, as the best text-book of that kind now extant. 



From The Nation: — In typography and illustrations the part before 

 us leaves nothing to be desired, while the author's style is very per- 

 spicuous. We hope the work will be used as intended, in colleges and 

 farm-schools and by agriculturists. 



From Nature, London: — The most recent memoirs connected with 

 these subjects have been made use of by the author; and this part of his 

 work is certainly the best manual of entomology which the English 

 reader can at present obtain. 



From the New York Tribune: — As a practical treatise on American 

 entomology, with references especially to the insects injurious or bene- 

 ficial to crops, it stands almost alone, and reflects the highest credit 

 upon American scholarship, patience, and scientific skill. 



OUTLINES OF COMPARATIVE EMBRY- 

 OLOGY; or, Life Histories of Animals, including Man Copiously 



illustrated. Svo. 

 From Prof. E. S. Morse, in Popular Science Monthly .—Altogether 

 it forms one of the most valuable works of science yet published in this 

 country, and it is safe to say that no working naturalist can do without 

 it. 



HENRY HOLT & CO., Publishers, NEW YORK 



