45^ Lui of Scoituh Patents^ 4"^* 
14. To John Main of Bagnio Court;, Newgate Street, LoH^ 
don : — For an improved method of preparing and spinning 
wool, cotton, silk, flax, fur, and all other fibrous substances.’^ 
Sealed at Edinburgh 80th December 18^. 
1. To John Winters of Abton, county of Middlesex?*^ 
For certain improvements on chimney-caps, and in the appli- 
cation thereof,” Dated at Edinburgh S8d January 18S1. 
2. To John Heakd of Birmingham Court, county of War- 
nock'.^^For improvements on; working apparatus.” Sealed 
at Edinburgh 28d January ISSl. 
LIST OF PLATES IN VOL. IV. 
Plate L Sketch of the Sahara, shewing the Route of Alexander 
Scott, by Major Rennell, - Pages 38, 225, and 235 
II. Map of the Country North of Ava, - - 7b 
III. Fig. 1. Snout of the Sword-fish, vol. iii. p. 411.-3. 
Diagram for Double Refraction, p. 129- — 4. Comp- 
tonite, p. 131. — 5. Murray's Apparatus for Restoring 
the Action of the Lungs, p. 139* — 7, 8, Q. Oers- 
ted’s Electro-Magnetic Apparatus, p. 170.- — 10. Ap- 
pai’atus for Burning the Diamond, p. 202.— 1 1. Clay- 
slate Axe found in a Whale, 216 — 12 , 13. Perkins'- 
Peizometer, 175. 
IV. Professor Hansteen’s Chart of the Variation and Dip 
of the Needle, - - - ll6, S65 
V. Chart of Captain Parry’s Discoveries in the Arctic 
Seas, and Chart of tlie North-West Coast of Hud- 
son’s Bay, - - - - 144 
VI. Fig. 1, 2. Richardson’s Machine for Raising Stones, 
. 281. — 3. Hansteen’s Apparatus for Measuring the 
Diurnal Variation of the Needle, p. 295.—- 4. Dia- 
gram for the Dip of the Horizon, p, 331. — 5. 
Illustrations of Dr W’^ollaston’s Idea of Electro- 
Magnetic Currents, p. 435. 
Vn. Diagram illustrative of Mr Herschel’s Experiments 
on the Deviation of the tints of Polarised Light, 
and on Circular Polarisation, - - 334, 371 
VIII. Contains the various kinds of Apparatus used by M. 
Ampere in his Electro-Magnetic Researches, - 406 
IX. Fig. 1. — 9, are figures illustrating Mr Deuchar’s 
Experiments on Flame, p. 374. See also p. 385. 
and 386. Fig. 10, 11, are Diagrams illustrative of 
Mr Riimker’s Method of Calculating Parallaxes, - 387 
X. Contains Figures illustrative of the Analysis of the 
Chess- Automaton of Kempelen. — Fig, 12, 13, shew 
the Knight's moves, covering Parallelograms less _ 
than the board, - - - 393 
XI. Contains a representation of the Proteus jjVnguInus, 398 
