OOLOGIST'S EXCHANGE. 



New Method of Applying Arsenic to 

 Bird Skins. 

 The Oologist's Exchange: 



I would like, through the columns of 

 this paper, to call the attention of Col- 

 lectors to a new method of applying 

 Arsenic to Bird Skins. It is done by 

 mixing White Arsenic and pure Glycer- 

 ine, until a thin cream is obtained which 

 is applied with a brush. 



No alum should be used, as it 

 changes the nature of the Glycerine, 

 making it thin and watery. Skins 

 treated with this preparation will re- 

 main soft and pliant many months. I 

 have now some skins which were made 

 •last February, and at date of writing 

 are soft enough to mount without being 

 softened or relaxed in any way. In a 

 few days after being applied, the Gly- 

 cerine is absorbed or dries partially 

 away, leaving a uniform coating of Ar- 

 senic, which never becomes hard or dry. 

 The mixture should be well stirred each 

 time before using, as it soon separates, 

 the arsenic settling to the bottom. Will 

 some practical collector try the method 

 and report through the columns of this 

 paper *? 



J. B. Underbill. 



Oct. 26th, 1889. 



A Collecting Naturalist offers for sale 

 cheap, first class specimens of Bird's 

 Eggs, Bird Skins, Minerals, Shells and 

 Curiosities. 



Price Lists printed separately. Price 

 one cent each. Positively none free. 

 Address 



E. M. HAIGHT, 

 Box 24. Riverside, Cal. 



THE LOON. 



Monthly 50 cents per annum. 



DEVOTED TO 



ORNITHOLOGY AND OOLOGY. 



Send for sample copy. 

 Thad. Surber, Publisher, 

 White Sulphur Springs, W. Va. 



OFFER. 



It is the desire of the publishers of 

 this paper to increase its circulation to 

 3,500, or double its present circulation. 



We do not think any other person in 

 the United States will sell you the two 

 books as cheap as they are in this offer. 



Da vies' Key, 3d Ed., paper $1.25 



A. O. U. Check List, N. A. Birds, 



abridged edition, 1889 50 



Oologist's Exchange, 1 year 20 



$1.95 

 Send you all for $1.50, postpaid. 

 Please note that no other person or 

 firm has ever sold books on ornithology 

 at other than regular rates, and this is 

 the only chance you will have to secure 

 the two Standard American Works on 

 the subject of which they treat on sucli 

 favorable terms. Kindly take up this 

 offer at once, and address your orders 

 to 



The Oologist's Exchange, 



P. O. Box 2060, 



New York. 



H. C. Belmont. 



J. C. Wemple. 



HENRY C. BELMONT & CO., 

 naturalist's Supplies. 



No. 1 EggDrills 6c. 



No.2 " 8c. 



No.3 " 10c. 



No. 3£ " 12c. 



No.4 " 14c. 



Brass Blow Pipes 10c. 



Rubber Syringes 25c. 



Soft Lead Pencils lc. 



Calipers 20c. 



We have a few eggs, about a hun- 

 dred sets in all, of various species, 

 which we offer at very low rates. Send 

 list of what you desire and we shall be 

 pleased to quote you. 



Postage prepaid on all our articles. 

 Even if you send an order for a lead 

 pencil, it is free of postage. 

 Very truly yours, 



Henry C. Belmont & Co., 

 P. 0. Box 2060, 



New York. 



