INDEX. 5^7 
approximating to the roots of algebraic equations, p. 472—474. Problems exem- 
plirvung the praiSfIcal application of this method, p. 475 — 485. 
Springs, near Edinburgh and at London, mean heat of, 460, 46 1 . Connexion between 
the mean heat of a country and the mean heat of its fprings, p. 461. 
Staffa, a weftern iiland of Scotland, vulcanic phenomena lately difeovered there, p. 10, 
Sta^e, what it was, p. 411, 41 2. 1 
Stedman, Dr. on triangles defcrlbed in circles and about them, p. 296. See Triangles. 
Steele, Jofliua, Efq. his account of a mufical inftrument brought from the ifle of Amller- 
dam, In the South Seas, p. 67. See Mufical infiru?}icnt. — His remarks on a larger lylfem 
of reed pipes from thence, with obfervations on the nofe flute of Otaheite, p. 72. See 
Flute. 
Stockholm, average of deaths for thefe flx years, p. 426, 427, n. Its order of human 
mortality, p. 440. 
Strange, Mr. his account of two giants caufeways, and other curious vulcanic concretions, 
in the Venetian State, in Italy, p. 4. His account of a curious giant’s caufeway, or 
group'of angular columns, newly difeovered in the Euganean hills, near Padua, in Italy, 
p. 418. See Bafaltes, Rojfo, Diavolo, Euganean hills, Fulcanic hills. Granite, Granitello, 
Giants-caufe'joay, Lansa, San Biafio, San Gothard. 
Stit ■inam, the gymnotus eledtricus brought from thence, p. 102. 109. 
Sutton Coldfield, in Warwickflrire, an account of, with an extradf from the parlfir regifler, 
P- 331- . 
Sucallo-M, Houfe, an account of the, p. 25 8. The bird’s want of fagaclty, p. 265. Sec 
Houfe Sveallo^o:. Swallows and Martini, an account of their torpidity, p. 343. See 
Torpidity, 
Siveden, average of deaths in, p. 427, n. Gains above 20,000 inhabitants yearly by the 
excefs of births above deaths, p. 437. The order of human mortality there, p. 438 ; 
for 9 years, p, 442. 
S'Mift, or Black Martin, account of the, p. 264. Largefl of the Britilh hirundines, ibid. 
Latefl: comer, ibid. Their nefts defedrive in architedfure, ibid. Sufpedted of expelling 
the houfe-fparrows from their nefts, and taking them to their ufe, 264, 265. Where 
they build, ibid. Begin nefting about the middle of May, ibid. Copulate on the 
wing, 263, 266. Common for infedfs to do fo, 266. The Swift appears to live more 
in the air than any other bird, ibid. Lays invariably but two eggs at a time, ibid. A 
mofl; alert bird, rifing early and retiring late, ibid. AlTemble in the air in groups, juft 
before they retire, ibid. Fond of fultry, thundery weather, 267. In hot mornings, the 
mates form- little parties, and ferenade their fitting hens, ibid. The hen relieves her- 
felf from her duty of Incubation, for a few minutes only, juft at dark, ibid. Swifts 
while they have young have a little lump of infedls pouched under their tongues. Ibid. 
Feed In general in a higher dlftridf than the other fpecies, ibid. Range to a great 
difiance, ibid. Their wings longer in proportion than almoft any other bird, ibid. 
When they mute in flight, their wings meet over their heads, ibid. Defeend below 
VoL. LXV. 4 F their 
