C 2 42 ] 
Explanation of Table IV. reprefenting the Cicuta 
aquatica of Wepfer. 
a, A Branch of this Plant with its Umbels of Flow- 
ers in different States. 
by The Appearance of the Bottom of the Stem, grow* 
ing from the Crown of the old Root. 
Cy An anterior View of the Flower of its natural Size* 
d y An anterior View of the fame magnified. 
e y A pofkrior View of the Flower magnified. 
f The Fafcuhm fern inale , and Seed. 
gy The fame magnified. 
Explanation of Table V. reprefenting the Root 
of the Cicuta aquatica in Winter . 
Fig. I. 
a y The Rudiments of the Leaves. 
by The old rotten Root not yet feparated from the new 
one of the preceding Summer. 
Fig. II. 
A longitudinal Se&ion of the Root exhibiting the Cells. 
XIII. A Letter to Mr. Benj. Robins, F. R. S. 
Jhewing that the Electricity of Glafs di/turhs 
the Mariners Compafs, and alfo nice Ba- 
lances. 
'Read June 
1746. 
Ftear Sir , J une ,0 - '74 6 - 
^•TTTHILE fo many Gentlemen are Ia- 
VV bouring to find out the Ufes of 
Electricity, it has been my Fortune to difeover one, 
at leaft, of the lnconveniencies attending' that Pro- 
perty 
