PREPARATIONS OF WOODS FOR STEREOPTICON. These are transverse sections, 

 from 1-4UI) to 1 (iijd iii. tliii-k, luouiitt'il brtwefii ;4l;i^s of standard stereopticon slide form, 

 3 1-4x4 ill. in size, the section covering a oirculur area generally 2 :i-i in. in diameter. They 



enable a display of wood struc- 

 tures to an audience in a most 

 satisfactory manner, projected 

 from nature itself. No one 

 who uses tlie stereopticon 

 should fail to try these valu- 

 able mounts. W*e have a large 

 series. 



Price: 50 cts. each; 40 cts. 

 each in quantities of twenty- 

 five or more; sample 2h cts. 



PREPARATIONS OF 

 WOODS FOR MICROSCOPE. 



These are transverse, radial 

 and tangential sections, mostly 

 11 '200 in. thick, stained with 

 methyl-green and mounted in 

 Canada balsam. Of these we 

 have also a large series, the 

 value of which is appreciated 

 Ijy those who have micro- 

 scopes and are prepared to 

 look into the wonderful mi- 

 nute structure of woods. It 

 is the possession of our large 

 stock of these mounts that has 

 enabled us to include in the 

 plan of the HANDBOOK the 

 photo-micrographs of wood- 

 structures. 



Price: 50 cts. each; 40 cts. 

 each in quantities of twenty- 

 five or more; samj^le 25 cts. 



VIEWS OF ISOLATED 



TREES showing halnts of 

 growth. Our field work gives 

 us excellent opportunities to 

 make negatives illustrative of 

 this interesting subject, and 

 we have already a consider- 

 able series which we are constantly adding to as we find suitable sul)jects. AVe have also a 

 large series illustrative of the 



FLOWERS OF TREES. These have been photographed while fresh, even liefore their 

 wilting, against a measured back-ground to indicate size, as per |i!;iii adopted with pictures of 

 leaves, fruits and branchlets in 



A Stereopticon Mount. Natural Size. 



I MICROSCOPE. 



i RpMEYN B. HOUGH, 



!^^ publisher 

 |"americ4n woods,' ' 



QUEBCUS 



obtusiloba, m ichx 

 Post Oar. 



the HANDBOOK. It is a choice 

 series covering most of the species 

 of northeastern United States and 

 Canada. We are prepared to fur- 

 nish both photographs and stere- 

 opticon views of the isolated trees 

 and flowers, as well as the leaves, 

 fruits, leafless branchlets ami 

 barks, which are shown in the 

 HANDBOOK. 



Prices: C o n t a c t-p r i n t photo- 

 graphs (5x7 or 5x8 in.), mounted, 



25 cts. each; unmounted, 20 cts. each; stereopticon views, 50 cts. each; 40 cts. each in quaa 

 titles of twenty-five or more; samples 25 cts. 



A Microscope Mount. Natural Size. 



