XII 



THE GUIDE TO NATURE— ADVERTISEMENTS 



CLAIMED AND PROVEN 



The quality of Satina, 

 backed solely by our 

 own statements, even 

 though we should and 

 do know its superior- 

 ity, would carry little 

 weight— \)ui when 

 An official com- 

 mittee after thorough' y testing 26 

 leading brands of interior wall 

 finishes places its endorsement on 

 Satina 



then our claim of supeiority becomes an 

 actual fact backed up by disinterested ex- 

 pert opinion. Ordered and reordered for 

 use on U. S. Government buildings, dwell- 

 ings, schools, etc. 

 Satina is a most satisfactory wall 



coating 

 It is sanitary, durable ; can be repeatedly 

 washed and is most economical. 



Send for full information, color cards and 

 working samples 



THE CHARLESIH. BROWN PAINT CO. 



188-190 Montague Siree 

 Boston Brooklyn, N. Y. Atlanta 



The Alvan Clark 

 & Sons Corporation 



Cambridj^e, Mass. 



MAKERS OF 



Astronomical 



and 



Terrestrial 



Telescopes 



Correspondence Solicited 



For "Bird 



Lovers 



BAUSCH & LOME BINOCU- 

 LARS give a field of view nine times 

 as great as that of the ordinary glass, 

 with even illumination and clear 

 definition to the edges. The stereo- 

 scopic efifect enables one to judge the 

 relative position of objects in the 

 landscape. 



THE "6-21" is the ideal bird glass. 

 Its superior optical qualities give it 

 great light-gathering power — just 

 what you need in the woods and on 

 cloudy days. The magnification 

 (6x) is ample, and by reason of the 

 prism construction, the glass is 

 about one-third the length of a cor- 

 responding Galilean glass. Because 

 of its compactness and light weight 

 it can easily be carried in the pocket. 



lyrite for Our In- 



teresting 



Booklet 



Givino- Full Details 



and Prices. 



Bausch jy Ipmb Optical (5. 



512 ST. PAUL STREET ROCHESTER, N.\: 



