THE WflRBL&RS IN GOUOR. 



Bird-Lore begins in its December issue, the 

 publication of a series of beautifully colored 

 plates, by Bruce Horsfall, accurately repre- 

 senting all the plumages of North American 

 Warblers. 



This number, with a Christmas card of a 

 before unpublished view of John Burroughs' 

 Cabin, " Slabsides," will be sent free to all 

 subscribers to Vol VI, 1904, of this magazine. 

 Or, on receipt of one dollar, we will send the 

 magazine and the card inscribed with your 

 name as donor of Bird-Lore for 1904, in time 

 to be received as a CHRISTMAS PRESENT. 



20 cents a number; $1 00 a year. 



Published for the Audubon Societies by 



THE MACMILLAN CO. 



66 Fifth Ave.. New York City, 



By Oliver Cummings Farrington, Ph.D. 



This valuable ivork is now in press. 



It tells what gems are made of, where they 

 come from, how to determine them, how to dis- 

 tinguish spurious gems, etc. 



It thus furnishes information of the great- 

 est value, not only to purchasers of gems, but 

 to those who desire to search for them in nature. 



Perhaps there is a valuable deposit of gem 

 minerals in your own locality which no one has 

 yet discovered. This book will help you to 

 find it. 



Sixteen accurately colored plates and nu- 

 merous text illustrations show the appearance 

 of the gems in their natural state, as well as cut 

 stones. No authoritative work on this subject, 

 with colored plates, was ever offered at so low 

 a price before, and it would be impossible to do 

 it now but for the publisher's superior facilities. 



240 pages. 16 colored plates. 40 text 

 illustrations . . . $2.50 



A. W. Mumford, Publisher 



378 Wabash Ave , Chicago 



The Greatest 

 Offer Yet. 



Offer I. 



For Fifty Cents, stamps ormoney order, we 

 will send you The World's Review, a 16 page 

 weekly current topic pajier for teachers, one 

 year, How to Teacb l>raw^ing. Our "Sew 

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 an Examination, Sone Favorites and 

 Uusy Heat Work 'the 5 lull sets). The total 

 value of the above is $2.35, and they cannot be ob- 

 tained for any less, except in this ofier. JKg~Wg 

 art giuing you the books free to tntroduoe them. 



Offer II. 



For V!i Cents we will send you all Offer 

 number one and also a year's subscription to 

 Normal Instructor & Teacliers' World. 



Offer III. 



ForSl.lO we will send you all of Offer 

 number oim and either The Educator, 

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lor one year, -nc-iotal value, $3.35. 



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If you have the unbound copies 

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 return them to us prepaid with 

 $1.50 and we will send you the 

 corresponding double volume XI 

 and Xll in half morocco. Or, if 

 you return the last five numbers 

 of Birds and Nature, we will 

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 Volume XIll in cloth for $0.75. 



A. W. MUMFORD, Publisher 

 378 Wabash Ave. CHICAGO 



