HINTS AND HELPS. l6l 



finished by his disciples and friends, who were in full sympathy 

 with Dr. Gray and his work, and conversant with his plans. 



Professor Coulter, of Wabash College, a man who stood high in 

 Dr. Gray's regard, has prepared a " Manual of the Botany of the 

 Rocky Mountains," which, being the only published flora of its 

 locality, is well-nigh indispensable to Western students. This 

 work, prefaced by "Gray's Revised Lessons," mentioned above, 

 comprises a complete introduction, grammar, and lexicon of the 

 subject for use in the West. For the special student and the 

 library, "Gray's Synoptical Flora" is well-nigh indispensable. 

 This was looked upon by the author as his life-work. The Gamo- 

 petalous Dicotyledons are issued complete in one volume. Other 

 sections of the work are understood to be ready for the printer, 

 but the concluding parts will be left to other hands to finish. 



Gray's Botanists' Microscopes, with either two or three lenses, 

 are admirably adapted to their purpose, and can be safely recom- 

 mended to learners. 



It is attached to a box, one and a half inches high, and less 

 than four inches long, into which it is neatly folded when not in 

 use. The needles are used for dissecting flowers or other objects 

 too small to be otherwise handled for analysis. The lenses mag- 

 nify about fifteen diameters ; or, with three lenses, about one-third 

 more. 



Dr. Gray's entire series of botanical text-books, a part of which 

 is described above, is published by Messrs. Ivison, Blakeman 

 & Co., New York and Chicago. 



No reference book should be more freely consulted than Web- 

 ster's Unabridged Dictionary. Its definitions of scientific words 

 are unequaled, and in all other departments of lexicographic 

 research it stands pre-eminent. It defines three thousand more 

 words than any other dictionary published in this country. 

 Thirty-six State superintendents of schools and over one hundred 

 college presidents recommend it. It is the standard authority in 

 the U. S. Supreme Court and in the Government printing-office. 



Little Flower People, by Gertrude E. Hale, presents funda- 

 mental botanical facts in a fanciful dress, arousing interest and 

 stimulating observation. Illustrated. 50 cents. A Primer of 

 Botany, by A. A. Knight, brings the subject to the level of inter- 

 mediate grades, and is especially valuable as an introduction to 

 physiological botany. Illustrated. 35 cents. Published by 

 Ginn & Co., Boston. 



The authority of Dr. Henry C. McCook, of Philadelphia, as an 

 investigator in entomology has been strengthened and extended by 

 his charming volume, " Tenants of an Old Farm : Leaves from 



