THE MICROSCOPE. 



179 



V. — GLANDULAR HAIRS ON SWEET BRIAR LEAF. 



Figure 1 shows a portion of the upper surface of a Sweet 

 Briar Leaf magnified only 5 diameters. This surface does not 

 have any glandular hairs but they may be seen projecting 

 from the edge. Figure 2 shows the lower surface of the leaf 

 which posseses more or less of the glandular hairs. The hairs 

 themselves highly magnified, are shown in figures 3, 4, and 

 5. The tip on figure 4 is a little cap of Otto of Rose. By care- 

 ful manipulation under the microscope, the cap is sometimes 

 dislodged and then shows the semi-crystalline appearance of 



Otto (or Attar of Rose), — the fragrant essential oil. Figure 5 

 represents the nearly colorless hairs. The interior of these ovals 

 is filled with a soft cellular tissue. 



VI. — THE WALKING FERN. 



We are indebted to Mr. Fred R. Stearns of the American 

 Magazine of Natural Science for all our information about this 

 form which does not seem to be mentioned in any of the prom- 

 inent botanies. He says that it grows in the shaded woodlands 

 of Iowa. Figure 1 illustrates the parent plant (Camptosorus 



