G 42£ ] 
1092 Stachys Canarienfc frutefcens, verbafci folio. 
Tourn. 
1093 Tamarifcus latiore folio. Park. Germanicus. 
Tourn. " 
1094. Tamarifcus tenuiore folio. Park. Narbonen- 
fs. Tourn. 
1095 Tacamahac foliis ferratis. Plukn. Phyt. 22$, 
Fig. 2. 
1096 Tanacetum vulgare lutcum. C. B. 
1097 Tanacetum foliis crifpis. Ibid. 
1098 Thlafpi Creticum purpureum. Park. 
1099 Trachelium umbelliferum Ponte. 
1100 Valeriana major hortenlis, Monfon. Phu. Off. 
XIV. An Inquiry into the Meafure of the 
Force of Bodies in Motion : With a 
Propofal of an Experimentum Crueis, to 
decide the Controverfy about it. By James 
Jurin, M. 2). Fellow of the Royal College 
of Phyficians, London, and of the Royal 
Society. 
Read May 30 . 
* 745 - 
M Echanical Forces may be reduced to 
two Sorts ; one of a Body at Reft, 
the other of a Body in Motion. 
The Force of a Body at Reft, 
is that of a Body 
lying Rill upon a Table, or hanging by a Rope, or 
fupported upon a Spring, &c. 
This is called by the Name of Preflure, Tenfion, 
Porce, or Vis mortua. 
Hhh 2 The 
