CHE REFERENCE LIBRARY - ZetaTalk

PROPAGz4TION BY MEANS OF SEEDS AND SPORES 29seeds, and is kept moist by capillary attraction; a glass cover (a).The apparatus is seen set tq) in Fig. 14. This device workson a principle long utilized in thetesting of seeds _ the capillarypower of earthenware and variousspecies of rock .-~-- and there aremany applkations of the idea inyrwt ice. These seed-testers may FIG. 15. Sprouting-cup.bv placed in an incubator orother heating de\*iw, or they may be used in the greenhouseor il living-room.A bulletin (So. 35) of the Rhode Tsland Rsperinient Stationdescribes and illustrates a modification of the absorbing-blockidea (Fig. 15). Instead of a slab of stone or earthenware,” sprouting cups ” are used. ‘L’l’licy are 3 inches in diameterand 1 -i- inches high, including the cover, which is ventilated.The bottom is solid and -$- inch thick. Each cup is placed in aglass dish in which a constant supply of’ wter is kept.” These