—23— 



In fig. C the circle a is cut out to fit closely about the nar- 

 rowest part of the neck of the homeopathic viai {k) containing 

 the glycerine jelly (/ ). The radiating lines a-b, etc., are cut with 

 a fret saw and the metal portions between them bent out (one at a 

 time) until a is large enough to allow the top of the vial to be 

 thrust through. 



The metal is then bent back and the bottle is held as shown 

 in fig. A. 



To place jelly on slide, remove the glass rod (/) and cork 

 (j) together, and touch end of rod to the warm slide on xb. If 

 more jelly is required, repeat. 



To prepare for use, pour into xa sufficient hot water to raise 

 the level to k, when vial k is in position, and place lamp with 

 small fla?ne in position. As soon as jelly is fluid it is ready for 

 use and will remain so as long as the water level is kept above 

 the tube c x % and the lamp is kept burning. The circulation of 

 water, which should never boil, is indicated by the arrows. 



THE DICRANUMS.-U. 



It is hoped that the following purely artificial key may prove 

 of value to beginners: 



1 — Capsule cernuous, more or less arcuate. . . 2 

 Capsule erect, symmetric 14 



2 — Upper leaf cells longer than broad, porose. . 3 



" " " not porose, nearly as broad as 

 long 5. 



3— Capsules clustered, leaves strongly transverse- 



ly undulate, silky undu latum. 



Capsules solitary 4. 



4 — Leaves transversely undulate when moist, 



slightly or not at all secund ; costa without 



lamellae at back Bonjeani. 



Leaves not at all undulate, secund, with 



strongly serrate lamellae at back. . . scoparium. 



5— Leaves strongly papillose at back, little or not 



at all secund. spurium. 



Leaves not noticeably papillose 6. 



6— Capsules clustered Drummondu. 



Capsules solitary (rarely two together in Miihl- 



enbeckii) 7 



7 — Costa not reaching apex Bergeri. 



Costa percurrent or excurrent 8 



