196 
James Small . 
Figs. 1-6. 
DESCRIPTION OF FIGURES. 
Figs. 1-3. Scale 1 cm. to 1 inch. 
Fig. 1. The complete ‘ Multiple Razor,’ showing the blades 1'', l£" 
and 2" apart; for details see text. 
Fig. 2. A razor-block, for details see text. 
Fig. 3. A razor-blade, ,, ,, 
Figs. 4-6. Longitudinal sections, x 104, of laticiferous vessels in midrib 
of leaf of Lactnca virosa, L. 
(a) from basal portion. 
(b) from penultimate basal portion. 
(c) from penultimate apical portion. 
(d) from apical portion. 
Fig. 4. Normal leaf. 
Fig. 5. Leaf after 48 hours in darkness. 
Fig. 6. Leaf after 4 days in darkness. 
