RESEARCHES UPON SALICIN. 
133 
Fig. 10 is their germination by giving off minute buds 
which ultimately become sporidia, four or five adhering occa- 
sionally to each other, and lastly separating. 
Fig. 11 represents the membrane of the sporidium laid open 
and increasing in size, developing green granules on various 
parts of its surface. 
Fig. 12 shows the manner a sporidium is divided by a sep- 
tum or septa, by the green granules extending themselves late- 
rally; different states being observed in the present figure. 
Figs. 13, 14, 15. Different stages of the same process. 
Fig. 16. The fungus assuming a radiating form, and begin- 
ning todevelope sporidia upon its branches. 
Fig. 17. The fungus arrived at maturity, its centre show- 
ing a structure analagous to that seen in fig. 7, and its several 
branches loaded with sporidia. Figs, from 8 to 17 magnified 
1000 times. 
Fig. 18. The acarus which lives on the interior of the ergot, 
being about one-fourth the size of the cheese-mite; magnified 
80 times. 
ART. XIX,— RESEARCHES UPON SALICIN AND THE PRO- 
DUCTS DERIVED THEREFROM. By M. R. Piria. 
Few chemical substances have received so little attention as 
salacin. Since its discovery by M. Leroux, MM. Pelouze and 
Jules Gay-Lussac have made known the results of the elemen- 
tary analysis of this matter, and nearly at the same time Bra- 
conot verified some of its properties. I am not acquainted 
with any later researches. 
The difficulty with which salacin enters into combination 
with other bodies,has been probably the cause of the neglect in 
which this body has remained until the commencement of these 
researches. In fact, bodies whose atomic weight may be de- 
