r «8 j 
dd. The Holes, thro’ which the Pin, in the Centre 
of the Quadrant, goes. 
Fig. 5 . The Ombrometer .* 
aa. The Board. 
bb. The Tube. 
c. The Graduation. 
d. The Funnel fixed in the Tube. 
e. The Funnel one Inch fquare. 
Fig. 6. The Wild-Oat Hygrometer. 
a. The Box and Plate. 
b . The wild Oar, with the Index upon it. 
c . The Pin, with a frnall Piece of Ivory on its Head! 
II, A Letter from Mr, William Watfon, 
Apothecary , F. R. S. to the Society, con- 
cerning fome Perfons being poifoned by eat- 
ing boiled Hemlock. 
Gentlemen , 
Read May TOtwithflanding the Number of In* 
? 744 ’ 1 ^ fiances, which occur among Writers, 
concerning the poifonous Quality of our common 
Hemlock, or Cicuta major of Cafpar Bauhin ; fuch 
as, that of Car dams mentioning a Man kill’d by a 
Cake, wherein this Plant was an Ingredient ; that of 
1 Brajfavola, who affures us, that it is mortal not to 
Men only, but to Geefe and Swine j as well as thofe 
of 
