for the Microscope. 7 



out the greater part of their length. The hairs are club- 

 shaped, and of a bright purple colour when fresh. (PL 

 L, fig. 7.) 



35. JCHNTED CLUBBED HAIR (Geum tirbanum). The 

 common Avens affords an example of a club-shaped hair, 

 divided into cells. (PI. I., fig. 13.) 



36. CAPITATE HAIR OF FIGWORT (Scrophularia nodosa). 

 The hairs of the Figwort have a broad head like a 

 button. (PI. I., fig. 8.) 



37. CAPITATE HAIR OF GOURD (CuairUta maxima). 

 A similar hair to the last, but with a proportionately smaller 

 head, is found on the leaves of the great Gourd or Pump- 

 kin. (PI. I., fig. 21.) 



38. HAIR OF SOUTHERNWOOD (Artemisia abrotanum). 

 This hair is divided into two limbs or filaments, each 

 of which is usually twisted or contorted. 



39. BEADED HAIR (Mirabilis jalapa}. The hairs of 

 the Marvel of Peru have a series of swellings throughout 

 their length, which give them a beaded appearance. 



40. GLANDS OF LOOSESTRIFE (Lysimachia vutgaris). 

 The short hairs of the Loosestrife are surmounted by a 

 twin gland, so as to appear to be double-headed. 



41. COLTSFOOT PAPPUS (Tussilago farfar). The white 

 downy substance which is attached to the seed of the 

 Coltsfoot, and several other plants of the same order, have 

 pairs of spiny projectors placed at regular distances 

 throughout the length of these hairs. (PI. I., fig. 10.) 



42. SCALE OF RUSTY-BACK FERN (Ceterach offitinaruni). 



The under surface of the fronds of this fern is so 

 covered with rusty scales that it is sometimes called the 

 rusty-backed fern. These scales are good objects for the 

 lowest powers. (PI. I., fig. 14.) 



43. SCALE OF FERN (Nothochlctna Itzvis.) Still more 

 beautiful are the scales of this cultivated fern. Although 

 in size and general form resembling the preceding, the 

 margin and base are set with long pointed spines. (PI. 



I-, % 15-) 



44. SCALE OF SEA-BUCKTHORN (Hippopha rhamnoides). 



A portion of the leaf of this plant, with the stellate 



