THE GUIDE TO XATURE—ADfERTlSEMEXTS 



XI 



pool, watching the caddisworms haul their 

 lumbering- cases about on the bottom, and 

 the planctologist plies his nets, recording 

 each season the wax and wane of genera- 

 tions of aquatic organisms, and both are 

 satisfied observers." 



Flowers. 



Flowers along the roadside, 



Flowers in garden bed, 

 Flowers with joyful wedding bells. 



Flowers where tears are shed; 

 Flowers to deck our tables. 



Flowers to soothe our pain. 

 Sweet is their companionship, 



Over and over again. 



■ — Emma Peirce. 



Studies at the British ]\Iint show that 

 the wasting of metal coins is not, as is 

 commonly supposed, principally the re- 

 sult of mechanical abrasion. On the con- 

 trary, the chief loss comes from the 

 chemical action of the acids of the per- 

 spiration. These act especially on cop- 

 per ; and while they do not directly affect 

 either gold or silver, yet by dissolving 

 out the copper in the alloys, they leave a 

 sponigy surface, which wears more rapid- 

 Iv than the fresh coin. 



LANTERN SLIDES 



and 



PHOTOGRAPHS 



of 



NATURE SUBJECTS 



ABOUT 3000 NEGATIVES 



of 



Birds, Nests, Mammals, Reptiles, Insects, 



Flowers, Etc. 

 Lists and Prices of Slides and Prints, 

 Plain or in Colors, Sent upon Application. 



L. W. BROWNELL 



210 Market St. 



Paterson, N. J. 



$48.00 



For Field Trios- 



A Portable 



Mi 



icroscooe 



is required that is really portable and 

 sacrifices none of the efficiency of 

 the bidkier instruments. APS 6 in 

 carrying case weighs 8 lbs., 5 oz. 

 The carrying case is less than one- 

 half the size of a regular microscope 

 case. The folding base is the only 

 collapsible feature and there is no 

 mclination joint. APS has the lever 

 side fine adjustment which is simple 

 in design and ceases to operate when 

 the objective touches the specimen. 



^ rW 



Equipped with Abbe Condenser, 2 eye- 

 pieces; 16 mm and 4mni objectives on 

 revolving nosepiece. 



Bausch tf Ipmb Optical (p. 



512 ST. PAUL STREET * ROCHESTER, N.Y* 



