[ 689 ] 
N- 
Kredle. Journal of the variation-needle, kept at Royal Society’s houfe, for a fortnight, 
p, 321. Journal of the dipping needle for a fortnight, p. 323. 
Needles. Account of fome new methods of fufpending magnetical, p. £37. Inconve- 
nience of the belt executed ones, with refpedl to the facility with which they are 
dragged out of their direction, p. 537. Remedied in different ways, p* C39. By 
putting them under water, p. 539. Thin fteel tubes recommended for this purpofe, 
p. 544. Inconveniences of common water for this purpofe, and recommendation of 
expreffed oils, p. 343. 
Nitre. Why it explodes when combuilible fubftances are thrown upon it, p. 396. 
O. 
Orarg-Outang, Account of the organs of fpeech of the, p. 139. Exa&nefs of almofi 
all Galen’s defcriptions of the Cynocephalus, p. 141. Why this animal cannot mo- 
dulate his voice fo as to articulate, p. 142. The meatus, or proceffus peritonasi* 
clofed in the Simia caudata imberbis, cauda fubprehenfili, corpore fufco, pedibus 
nigri c , p. 143. Two papiones or fphinges of Linnaeus differed, ibid. Seven 
examined by Profeffor Camper, p. 144. Want of nails on the great toes of the feet,, 
and of the fecond phalanx of the great toes, a remarkable character in thefe animals, 
p. 146. A little nail and two phalanxes feen on the great toe of one, ibid. Sin- 
gular red long hair, and fhortnefs of the neck, another very peculiar property, ibid, 
Mr. Edwards miftaken in the reprefentation of the Orang-Outang, ibid. The 
figures of the Orangs, defcribed by Tulpius and Tyfon, deficient in many refpedts, 
p. 147. Probable that Africa furnifhes a fpecies of apes which are not the Pithecos 
of the ancients, ibid. Probable that Galen differed an Afiatic Orang, p. 148. 
Vermicular procefs of the inteftinum coecum in the Angolefe and Afiatic Orang, and 
likewife in the Gibbon, unknown to-Galen, ibid. The organs of fpeech defcribed, 
ibid. The ventricles of one united, fo as to form but one, p.150. Quere, whether 
they grow together thus, or whether this be a variety $ ibid. Hiftory of the Orang 
belonging to the Prince of Orange, which died in 1777, p. 131. Account of the 
internal part of the organ of voice, and comparifon of it with Galen’s defcription, 
p. 154. Reafon why this animal cannot fpeak, p. 133. Analogy of its organs of 
voice with that of frogs, p. 156. 
Ores, Affay of feveral in Dr. Hunter’s mufeum, p. 327. See Silver, 
Os humeri. Head of one fawed off, and yet the motion of limb prefirved, p. 6» 
Ovary, A difeafe in the left, the caufe of a dropfy, p. 57, 
Palfcbau* 
