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Chairman-The Right Hon. LORD BROUGHAM, F.R.S., Memb. Nat. Inst, of France,
Vice-Chairman—The Right Hon. Lord J. RUSSELL, M.P.
Treasurer-WILLIAM TOOKE, Esq., M.P., F.R.S.
house, Bart, M.P.
Rt. Hon. Lord Nugent.
David Jardine, Esq., M.A.
W. H. Ord, Esq. M.P.
The Right Hon. Sir H. Parnell, G. Burrows, M.D.
Sir Henry Ellis, P.R.S., Prin. The Rt. Hon, the Earl of Kerry, Bart., M.P. J. B. Carter, Esq. M.P.
Lib. Brit. Mus.
Dr. Roget, Sec. R.S., F.R.A.S.
Thomas Falconer, Esq. George C. Lewis, Esq., M.A. J. Abel Smith, Esq., M.P.
John Taylor, Esq., F.R.S. J. Fred. Daniell, Esq., F.R.S. B. Gompertz, Esq., F.R. and George Long, Esq., M.A. Dr. A. T. Thomson, F.L.S. J. F. Davis, Esq., F.R.S.
J._W. Lubbock, Esq., F.R., H. Waymouth, Esq. H. T. De la Beche, Esq., V.P. G. B. Greenough, Esq., F.R. & R.A., and L.S.S.
J. Whishaw, Esq., M.A., F.R.S. Geol. Soc.
H. Malden, Esq., M.A. John Wood, Esq.
THOMAS COATES, Esq., Secretary, 59, Lincoln's Inn Fields.
Maidenhead-R. Goolden, Esq., Ripon – Rev. H. P, Hamilton,
A.M., F.R.S. and G.S.
Rev. P. Ewart, M.A.
Clement T. Smyth, Esq. Ruthen-Rev. the Warden of. Barnstaple- - Bancraft, Esq. Coventry-Ar. Gregorv, Esq. John Case, Esq.
Humphreys Jones, Esq. William Gribble, Esq. Corfu-John Crawford, Esq.
Malmesbury-B.C.Thomas, Esq. Ryde, Isle of Wight-
Manchester Local Association- Sır Rd. Simeon, Bart., M.P.
Benj. Heywood, Esq., Treas. Shepton Mallet-
Shrewsbury-R. A. Slaney, Esq.,
Benj. Gott, Esq.
South PethertonJames Williams, Esq.
- Norman, Esq.
Merthyr Tydvil-J. J. Guest, J. Nicholetts, Esq. Bristol.-J. N. Sanders, Esq., Lt.-Col. C. Hamilton Smith, Esq., M.P.
St. Asaph-Rev. Geo. Strong. Chairman.
Minchinhampton - John Ball, Stockport — Henry Marsland,
Tavistock-Rev. W. Evans.
Neath-John Rowland, Esq. John Rundle, Esq.
Newcastle-Rev. W. Turner. Truro-Richard Taunton, M.D. Cambridge-Rev. James Bow- Alexander McGrigór, Esq. Newport, Isle of Wight
Henry Sewell Stokes, Esq. stead, M.A. Charles Tennant, Esq.
Abr. Clarke, Esq.
Tunbridge Wells - Dr. Yeats, Rev. Prof. Henslow, M.A., James Cowper, Esq.
T. Cooke, Jun., Esq.
R. G. Kirkpatrick, Esq. Warwick-Dr. Conolly.
Waterford-Sir John Newport,
Newtown, Montgomeryshire- Bart.
William Pugh, Esq. Wolverhampton - J. Pearson,
Professor of Chemistry. Dr. Hastings, M.D.
C. H. Hebb, Esq.
Rev. John Jordan, B.A. Wrexham-Thomas Edgworth,
Liverpool Local Association--Plymouth - H. Woollcombe, Major William Lloyd. John Brent, Esq.
w. w.jCurrie, Esq., Chair- Esq., F.A.S., Chairman. Yarmouth - C. E. "Rumbold, William Masters, Esq.
Snow Harris, Esq., F.R.S. Esq., M.P.
G. Wightwick, Esq.
York-Rev. J. Kenrick, A.M. Carnarvon-R.-A. Poole, Esq. J. Ashton Yates, Esq.
Presteign-Dr. A. W. Davies, J. Phillips, Esq. F.R. S., William Roberts, Esq. Ludlow-T. A. Knight, Est.
THE THEORY OF PROJECTION, SO FAR AS IT IS
AUXILIARY TO GEOMETRY;
WITH AN ACCOUNT OF THE
PLANE SECTIONS OF THE CONE AND CYLINDER,
IN WHICH CEPTAIN GENERAL PROPERTIES OF THE CONIC SECTIONS
DEMONSTRATED BY HELP OF THE FOREGOING THEORY,
PUBLISHED. UNDER THE SUPERINTENDENCE OF THE SOCIETY
FOR THE DIFFUSION OF USEFUL KNOWLEDGE,
Chairman--H. BROUGHAM, Esq., F.R.S., M.P. Vice Chairman--LORD JOHN RUSSELL, M.P.
Treasurer-WILLIAM TOOKE, Esq., F.R.S.
Rt. Hon. J. Abercrombie.
B. Gompertz, Esq., F.R.S.
James Mill, Esq.
Ashburton-J. F. Kingston, Esq.
D. Ellis, Esq., F.R.S. Birmingham Local Association,
Capt. Basil Hall, R.N., F.R.S. Rev. Jn. Corrie, Chairman.
L. & E. Paul Moon James, Esq., Treasurer.
Francis Jeffrey, Esq. Joseph Parkes, Esq. Į Honorary
Prof. Napier, F.R.S.E.
Rev. A Thomson, D.D.
Etruria,Jos. Wedgwood, Esq.
Rev. Prof. Henslow, M.A., F.L.S. & Glasgow --K. Finlay, Esq.
D. Bannatyne, Esq.
Professor Mylne. Henry Malden, Esq., M.A.
Alexander McGrigor, Esq. Fred. Malkin, Esq., M.A.
C. Macintosh, Esq., F.RS. Rev. Geo. Peacock, M.A., F.R.S. & Mr. T. Atkinson, Hon. Sec. G.S.
Hull-Daniel Sykes, Esq., M.P. Marmaduke Ramsay, Esq. M.A., Keighley, Yorkshire-Rev. T. Dury, M.A. F.L.S.
Launceston-Rev. J. Barfitt. Rev. Prof. Sedgwick, M.A., F.R.S. Leamington Spa-Dr. Loudon. & G.S.
Leeds-Benjamin Gott, Esq. Professor Smyth, M.A.
J. Marshall, Jun., Esq. Rev. C. Thirlwall, M.A.
Lewes--J. W. Woollgar, Esq. Derby - Joseph Strutt, Esq.
Liverpool Local Association. Wm. Strutt, Esq.
Dr. Traill, Chairman. Devonport-Major J. Hamilton Smith, J. Mulleneux, Esq., Treasurer. F.R. and L.S.
Rev. W. Shepherd. Dublin-Hon. Thos. Vesey.
J. Ashton Yates, Esq. Edinburgh-R. Greville, LL.D.
Maidenhead-R. Goolden, Esq., F.L.S.
Manchester Local Association.
G. W. Wood, Esq., Chairman.
Sir Geo. Philips, Bart., M.P.
T. Cooke, Jun. Esq.
R. G. Kirkpatrick, Esq.
G. Grant, Esq.
Rev. Dr. Inman, Nav. Col.
John Rundle, Esq.
Dr. Hastings, M.D.
THOMAS COATES, Secretary, 4, South Square, Gray's Inn.
London : Printed by WILLIAM CLOWES, Stamford Street.
Section 1. Of lines, perpendicular, or inclined, or parallel, to planes