(84) 
%i& the Lejfer Toney that of lo to p, or 20 to 18, may ba 
in like manner divided into that of 20 to 19, and that of 19 
to 18: Thatis, nx^f = |; = '|. 
Which Divifionsof the Greater and Lejfer Tone, anfwer to 
what is wont to be defigned by Flats SLnd Sharps. 
So that (by this Computation J of thcfc Eight Notes, la, fa 
fol la^ mi, fafol la; their Proportions ftand thus • that of la 
fa (or mi fa) is as 16 to 15-. That of fa fol as lo to 9, and 
that oi{ol laSLS 9 to 8 '.(or cife that fa fol as 9 to 8,and that 
of folia as 10 to That of la 77?;as9 to 8. And if either 
of the Tones (Greater or Leffer J chance to be divided (by 
Flats or Sharps) into (what they call) Hemi- tones, their Pro- 
portions are to be fiich as is already mentioned. 
There may be a like Divifion of a Fourth (or Dia-teJJaron) 
into Two Near equals : And of feme others of thefe, into 
Three Near-equals. Which might be of ufe for (what they 
were wont to call) the Chromatick and Enarmonick Mufick. 
But thofe Sorts of Mufick, having been long fince laid afidc, 
there is now no need of thefe Divifions, as to theMufick now 
in u(e. 
V. Part of a Letter from Mr. Ray, F. R. S. 
to Dr, Sloane, gi'ving an Account of tht Foy- 
fonom Qualities of Hemlock- Water- Drop- 
Wort, 
I Shall now connmanicate to you, a Story or Two of 
the direful Effeits of Oenanthe aqmttca^ Ckutcefacti 
fucco Virofo of Lohd^ which we may Engliih Hemlock^ 
Water-Dropworty upon feveral Perfons that eat of the 
Roots of It, fent me not long fince in a Letter from 
Dr. Francis Faughan^ a Learned Phyfitian in Ireland ^ 
living at Clonmell, in the County of Tipperary, This 
Gentleman obferving rr :e, notwithftanding what Dr.Joh»» 
fon in his Cerardus emaculatus, and Lohl in his Jdver* 
faria 
