THE BEGINNING OF A COLLECTION. 



25 



Desirable Supplies for the School. 



Cabinet for insect cases. See page 294. 



Pliers or pinning forceps. See page 299. 



Cases, pins, vials, and alcohol. 



Microscope. See below. 



Supplies for mounting microscopic objects. See 

 page 300. 



At least the teacher should possess a lens. Ol 

 the cheaper lenses the form known as the Codding, 

 ton lenses I have found to be the best. These are 

 commonly kept by stationers or jewelers. They can 

 also be procured of any dealer in optical instruments. 

 See list of dealers at the end of this volume. 



If a microscope be procured for the school, care 

 should be taken to get one provided with what is 

 known as the society screw, so that objectives of any 

 of the more prominent makers can be used on it. If 

 the funds at the disposal of the school will only admit 

 of the purchase of a microscope with a single objec- 

 tive, a three-fourths-inch objective will be found as 

 useful as any for entomological work, and perhaps 

 later a one-fifth-inch objective or others can be added. 

 Price lists of microscopes will be furnished by deal- 

 ers in optical instruments. Most dealers make 

 discounts from their list prices when furnishing 

 schools. ■ 



In preparing the above suggestions we have tried 

 to keep in mind the needs and the ability of supply- 

 ing these needs of both teachers in the smaller 

 schools, where there may be no funds to spend for 

 apparatus, and of teachers in the larger schools, where 

 even costly apparatus can be purchased. 



